Symcom 777-MV-P2 Installation Guide

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INSTALLATION INSTRUCTIONS

MODEL 777-MV-P2

ELECTRONIC OVERLOAD RELAY

Rapid City, SD, USA, 03/2010

Revision A3

77-MV-P2_ II_7

2880 North Plaza Drive, Rapid City, South Dakota 57702

(800) 843-8848 · (605) 348-5580 · fax (605) 348-5685

CONNECTIONS .............................................................................................................................3

PROGRAMMING............................................................................................................................7

PROGRAMMABLE PARAMETERS...............................................................................................8

OPERATION.................................................................................................................................11

PROGRAMMING EXAMPLES .....................................................................................................12

SYSTEM DISPLAY.......................................................................................................................14

TROUBLESHOOTING..................................................................................................................15

CLEARING LAST FAULT.............................................................................................................16

TAMPER GUARD.........................................................................................................................16

GROUND FAULT TESTING PROCEDURE.................................................................................17

777-MV-P2 SPECIFICATIONS.....................................................................................................18

BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!

FOLLOW NATIONAL, STATE AND LOCAL CODES.

READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION. TION.

WARNING!

Hazardous Voltage. Failure to follow these instructions can result in death,

Power must be disconnected prior to attaching and/or using the battery cable.

Damage to the device or serious injury may occur if the battery programming feature is used while power is applied. Always follow proper safety procedures for removing and securing the power source before connecting the battery cable.

The battery cable cannot be used when power is applied to the device. To program the device when it is powered, the user must utilize a network programming option.

The 777-MV-P2 is an electronic overload relay that is fully programmable for customized protection. The 777-MV-P2 is designed to protect 3-phase systems operating at medium voltage ranges. The output relay is a Form C contact, which can control a contactor or other device within the output relay contact rating. Typical applications can include pumps, grinders, and other 3-phase medium voltage applications.

The 777-MV-P2 can be safely programmed prior to installation by supplying power with a 9V battery. See Figure 5 in the PROGRAMMING section. DO NOT connect the battery to the unit when line voltage is present. The 777-MV-P2 cannot a 9V battery. For testing purposes, 3-phase power must be used with a minimum voltage of 100VAC. Follow all safety warnings when dealing with hazardous voltages.

CONNECTIONS

1. Disconnect power and verify line and control power are off.

2. Using the four corner tabs or the DIN rail mount, install the 777-MV-P2 directly above or below the contactor. To mount on a DIN rail, hook the top clips first then apply downward pressure until the lower clips snap onto the rail.

3. External CTs (current transformers) are required. SymCom recommends using CTs with terminal connections for easier installation. All CT secondaries must make one or two passes through the round holes on the MotorSaver®Plus according to Table 1. See Figure 2 for a typical wiring diagram.

4. a) 3-phase voltage input: 100-240VAC, 3-phase voltage can be made available by using three

potential transformers in a wye-wye configuration. Reverse-phase protection, single-phase and unbalance protection are available when using the wye-wye configuration shown in Figure 4A. The motor will not start under these voltage fault conditions. Connect the 3-phase

serious injury, or equipment damage.

be tested for proper operation or communications using

power from the secondary of the potential transformers to L1, L2 and L3 on the Model 777MV-P2 using #12-18 AWG wire.

b) 3-phase voltage input: Alternatively, 100-240VAC, 3-phase voltage can be made available

by connecting two potential transformers in an open delta configuration (Figure 4B).

c) Single-phase voltage input: If only single-phase, 120V control power is available, insert

control power into L1 and L2 inputs (Figure 4C). L3 must not be connected. phase voltage input is used, single-phase faults are detected only after the motor starts and reverse-phase protection is not available.

NOTE: Pay close attention to the wiring diagrams to eliminate any errors when communicating

power factor information over a network. The L2 phase conductor must pass through the B current measurement hole for proper operation. VUB must be set to 999 for proper operation with a single-phase voltage input.

5. Connect the 3-phase (or single-phase) power from the secondary side of the potential transformer terminals using 12-18 AWG copper wire according to Figure 1 These should be tightened to 7 in.-lbs., max.

6. Connect the control circuit wires to the appropriate terminals. The relay is designed for fail-safe operation; the NO (normally open) contact should be in series with the coil on the contactor for motor control (see Figure 1). For alarm circuits, the NC (normally closed) contact is in series with the alarm circuitry.

Recommended

Full Load Amps

10-25 10-50 0, 5-49 2 25 (50:5) 20-50 20-100 0, 10-98 1 50 (50:5)

30-75 30-150 0, 15-147 1 75 (75:5) 40-100 40-200 0, 20-196 1 100 (100:5) 60-150 60-300 0, 30-294 1 150 (150:5) 80-200 80-400 0, 40-392 1 200 (200:5)

120-300 120-600 0, 60-588 1 300 (300:5) 160-400 160-800 0, 80-784 1 400 (400:5) 200-500 200-999 0, 100-980 1 500 (500:5) 240-600 240-999 0, 120-999 1 600 (600:5) 280-700 280-999 0, 140-999 1 700 (700:5) 320-800 320-999 0, 160-999 1 800 (800:5)

OC Range

(Amps)

UC Range

(Amps)

# of Passes

through each

Window

When single-

MULT (CT

Ratio)

Table 1: Wiring Configuration Based on Motor Full Load Amps

Do not allow the continuous current to exceed the CT rating. Consult the CT manufacturer

Figure 1: Typical Wiring Diagram

Figure 2: Typical Wiring Using External CTs

All CTs must face the same direction, and all CT secondaries must be wired identically, i.e. all X1

terminals enter the main (round) window and return to H1 terminal after exiting the loop conductor window

Figure 3: Looping Example for 12.5-25A, MULT = 25

Figure 4: Potential Transformer Diagrams3

(rectangle). Every CT secondary must make one or two passes through the corresponding main conductor window. SymCom recommends using CTs with terminals to simplify installation.

All potential transformers typically have 120VAC secondaries. The 777-MV-P2 may be installed with 3phase voltage input (Figures 4A & 4B) for full voltage monitoring and protection. If the single-phase voltage input is used (Figure 4C), the 777-MV-P2 is a current monitor only.

PROGRAMMING

To program prior to installation, connect the 9V battery cable to the pins on the left side of the unit (when looking at the display), and then attach a standard 9V battery to the cable. See Figure 5. The 9V battery cable is keyed for proper installation. If the cable is connected improperly, the 777-MV-P2 will not power the display. DO NOT connect the battery when line voltage is present. The 777-MVP2 cannot purposes, power must be used with a minimum voltage of 100VAC. Follow all safety warnings when dealing with hazardous voltages.

1. Rotate MODE SELECT to the parameter to be programmed. It is recommended that LV be

2. Press and hold the RESET/PROGRAM button.

3. While holding the RESET/PROGRAM button, rotate the DISPLAY/PROGRAM knob until the

4. Release the RESET/PROGRAM button. This stores the new parameter in the nonvolatile

5. Move clockwise through the positions to complete the process. Continue steps 1-4 until all

be tested for proper operation or communications using a 9V battery. For testing

programmed first.

proper setting for the parameter that is being programmed is displayed.

memory. If the number changes back to what it was before programming, then the tamper guard is on and will need to be unlocked before programming can be completed (see Tamper Guard).

parameters are programmed.

Figure 5: Proper Position of the Battery Cable

PROGRAMMABLE PARAMETERS

The following settings MUST be programmed by the user in order to provide proper protection for the application. Settings vary by situation and application and should be selected and tested for each unique installation. All parameters are actual values except for the VUB and CUB settings; these are programmed as percentages. The range each parameter can be programmed is found in the electrical specifications table. See Programming Examples for sample setup instructions. Failure to program all setpoints could result in nuisance tripping or prevent the device from protecting the motor. Always use the proper CTs for the motor full load amperage (FLA).

LV/HV - Low Voltage/High Voltage. The recommended settings for LV (low voltage) and HV (high

voltage) according to the NEMA MG1 standard are ±10% of the motor’s nameplate voltage. Generally, the motor manufacturer should be contacted to verify these limits. High and low voltage trips are based on average voltage measured. Never set LV higher than HV.

VUB - Voltage Unbalance. The NEMA MG1 standard does not recommend operating a motor

above a 1% voltage unbalance without derating the motor. Voltage unbalance is determined from the following formula: % Voltage Unbalance = [(Maximum Deviation from the Average) / Average] x 100% The NEMA MG1 standard also recommends against operating a motor above a 5% voltage unbalance under any circumstances. Therefore, a setting below 5 is a good place to start but SymCom recommends consulting the motor manufacturer for specific tolerances.

NOTE: A setting of 999 will disable reverse-phase, single-phase and voltage unbalance protection. This setting should be used when single-phase voltage control power is used. Single-phase faults will only be detected from current measurements after the motor starts. The unit will only read and display voltage on one phase (L1-L2) even if 3-phase power is applied.

Example: Measured line-line voltages from the face of the 777-MV-P2, which read the

secondary side of a wye-wye potential transformer configuration, = 118, 121 and 117. The average voltage is (118+121+117)/3 = 118.7. The maximum deviation from the average is the greatest difference between the average voltage (118.7) and any one voltage reading: 118-118.7 = 0.7, 121-118.7=2.3 and 117-118.7=1.7. The maximum

MULT - MULT (multiplier) setting is found in Table 1. The MULT setting is determined by the number

OC - Overcurrent. Is typically set to the service factor amperage (SFA) of the motor or 100-135%

NOTE: When using external CTs, do not set OC greater than the thermal rating of the CTs UC - Undercurrent. Is most commonly set to 80% of the full-load amperage (FLA) of the motor.

CUB - Current Unbalance. SymCom recommends contacting the motor manufacturer for a

deviation from the average is 2.3, thus voltage unbalance = 2.3/118.7 x 100= 2.0%.

of passes of the leads from the secondary side of the external CTs and the full load amps of the motor the unit will be monitoring. MULT sets the trip point range for undercurrent, overcurrent and ground fault current faults. Set MULT first, then set UC, OC and GF.

of motor full-load amps (FLA), which are determined by the motor manufacturer. The value must be higher than UC. If any one leg exceeds the OC setting, the 777-MV-P2 will trip according to the Trip Class (TC) settings.

This is usually adequate for protection of loss of load for many pumps and motors, including submersibles. If the motor is drawing less than full load amperage, then the UC may be set lower than 80% of FLA for adequate protection. Centrifugal/booster pumps may have to be set to something higher than 80% of FLA for adequate protection. UC can be set to 0 if UC protection is not desired. The 777-MV-P2 examines average current to determine if an undercurrent trip condition exists. The value must be lower than OC

specific setting. Current unbalance is calculated the same way voltage unbalance is calculated (see formula above). Setting CUB to 999 will disable current unbalance and current single-phase protection.

TC - Trip Class. Determines how quickly the 777-MV-P2 will trip when an overcurrent (overload)

condition is detected. TC is a dual-function setting—both a thermal trip class (NEMA standard) and a linear trip delay (in seconds) can be set.

While the standard trip classes are 5, 10, 15, 20, and 30, TC can be set from 2–60, with or

without jam protection. The trip class setpoint is the time in seconds that the device will take to trip when any phase current is greater than or equal to 600% of the OC setpoint. These additional “non-standard” trip classes allow the unit to follow a trip curve in-between the “standard” trip class curves shown in Figure 6.

Trip classes 2–60 can be set from approximately the 7 o’clock to 10 o’clock position with the DISPLAY/PROGRAM knob. Trip classes J02–J60, which include jam protection, can be set from approximately the 10 o’clock to 1 o’clock position. This additional jam protection feature, when enabled, is initiated 1 minute after the motor starts and provides a 2-second trip delay for motors exceeding 400% of the OC setting.

The linear overcurrent trip delay can be set from approximately the 1 o’clock to 5 o’clock position from 0–60 seconds (L00–L60) or to “oFF.” If TC is set to L00, the 777-MV-P2 will trip off within 1 second after motor current reaches the OC setpoint. If both trip class and linear trip delay settings are programmed, the 777-MV-P2 will follow the faster trip time. For example, TC is set to J15 and L20, and the amperage is 200% of the OC setting. Following the trip class 15 curve, the 777-MV-P2 will trip off in approximately 100 seconds. Thus the 777-MV-P2 will follow the linear trip delay setting, because it is faster, and will trip off in 20 seconds.

The motor manufacturer should be contacted for an exact TC setting. Table 3 describes the trip classes, and Figure 6 shows the trip class curves.

RD1 - Restart Delay One. Rapid-cycle timer, in seconds (default). The purpose of this timer is to

provide protection against short cycling and to allow adequate cool down time between motor starts. This timer is initiated when power is first applied to the unit. If no voltage fault conditions exists, the output relay will energize (the NO will close and the NC will open) as soon as RD1 timer expires. In most cases, this is set to 20-30 seconds. This should provide adequate protection for successive power outages or short cycling caused by other motor controls. This timer is also initiated when motor current goes to zero. Setting RD1 to zero will turn off this feature and ensure that when an alarm circuit is used, an alarm will sound only when there is a fault or power to the unit is lost.

RD2 - Restart Delay Two. Referred to as a motor cool-down timer, in minutes (default). RD2 is

used to restart the motor after a trip due to a current unbalance, current single-phasing, or an overcurrent condition. A setting of 5-10 minutes will give most motors adequate time to cool down after an overcurrent condition. The motor manufacturer should be contacted for an exact value.

RD3 - Restart Delay Three. This timer, in minutes (default), only initiates after an undercurrent trip

and is referred to as a dry-well recovery timer in pumping applications. This is set according to the time it takes for the well to recharge after pumping dry. This setting varies widely by application and there is no typical setting. RD3 can be set from 2-500 minutes or to A to enable the automatic Dry-Well Recovery Calculator.

The Automatic Dry-Well Recovery Calculator allows the 777-MV-P2 to automatically select

a restart delay based on the run time of the last run cycle before tripping on an undercurrent fault. Table 2 shows the next restart delay vs. run time. In general, a longer run time produces a shorter restart delay. This feature allows the 777-MV-P2 to optimize running and rest times automatically.

Run Time

> 1Hr 6 10 30 min.- 59.99 min. 15 4 15 min.- 29.99 min. 30 2

< 15 min. 60 1

TABLE 2: Automatic Dry-Well Recovery Timer

Next Restart

Delay (minutes) Starts/Hr

#RU/ADDR - Restart Attempts (undercurrent)/Address. The #RU/ADDR is a dual-function setting.

#RU settings are displayed and selected by turning the DISPLAY/PROGRAM knob from approximately the 7 o’clock to 12 o’clock position. ADDR settings are displayed and selected by turning the DISPLAY/PROGRAM knob from approximately the 12 o’clock to 5 o’clock position.

#RU is the number of restarts the 777-MV-P2 will attempt after an undercurrent fault before the unit locks out and requires a manual reset. #RU can be set to 0, 1, 2, 3, 4, or A. This counter is cleared one minute after restarting if the 777-MV-P2 does not trip again on undercurrent.

If #RU is set to “0”, the 777-MV-P2 will require manual resetting after all undercurrent faults. If #RU is set to “A”, the 777-MV-P2 will always automatically restart after undercurrent faults, once the RD3 timer expires.

ADDR is the RS-485 address of the 777-MV-P2 and is only used when communicating with any external communication device. The address can be set from A01–A99.

#RF/COM - Restart Attempts (other faults)/Communications Settings. The #RF settings are

displayed and selected by turning the DISPLAY/PROGRAM knob from approximately the 7 o’clock to 12 o’clock position. COM settings are displayed and selected by turning the DISPLAY/PROGRAM knob from approximately the 12 o’clock to 5 o’clock position.

#RF is the number of restarts the 777-MV-P2 will attempt after current unbalance or current single-phase faults before the unit locks out and requires a manual reset. This counter will be cleared one minute after start-up if the unit does not trip again for the same fault condition. Available settings are 0, 1, 2, 3, 4 and A, or to include overcurrent faults, #RF can be set to oc1, oc2, oc3, oc4 or ocA.

If #RF is set to “0”, the 777-MV-P2 will require manual resetting after all current unbalance,

current single-phase and overcurrent faults.

If #RF is set to “A”, the 777-MV-P2 will always restart automatically after current unbalance

and current single-phase faults, once the RD2 timer expires. Overcurrent faults will require a manual reset.

If #RF is set to “ocA”, the 777-MV-P2 will always restart automatically after current

unbalance, current single-phase and overcurrent faults, once the RD2 timer expires.

COM determines the baud rate, even/odd parity, and stop bit. COM can be set to C00-

C07. C00 and C04 are duplicates provided for backward compatibility.

• C00 = 9600 baud, No parity, and 1 stop bit

• C01 = 9600 baud, Odd parity, and 1 stop bit

• C02 = 9600 baud, No parity, and 1 stop bit

• C03 = 9600 baud, Even parity, and 1 stop bit

• C04 = 19200 baud, No parity, and 1 stop bit

• C05 = 19200 baud, Odd parity, and 1 stop bit

• C06 = 19200 baud, No parity, and 1 stop bit

• C07 = 19200 baud, Even parity, and 1 stop bit

UCTD - Undercurrent Trip Delay. The length of time, in seconds (default), the unit will allow the

motor to run in an undercurrent situation before de-energizing its relay. Typically, UCTD is set to 2-4 seconds to allow for motor to reach full load.

GF - Ground Fault. The maximum allowable current that can flow to ground before the 777-MV-

P2 de-energizes its relay. This is a residual, class II ground fault system and should not be used for personnel safety. A typical setting for GF is 10-20% of motor FLA (in amps). GF may be set to oFF if this feature is not desired. The GF test procedure in this installation instruction manual must be conducted before the device is brought online.

OPERATION

The relay operation of the Model 777-MV-P2 is designed to be fail-safe. This means when the voltage is within the programmed limits, the relay will energize—the NO contact will close and the NC contact will open. When the unit loses power or senses a fault condition, the relay will deenergize and contacts will return to their original state. Once the unit has been installed and programmed, the unit is ready to operate. Turn MODE SELECT to the RUN position. The display will show “run” alternating with a number (the number displayed will be the number corresponding to where the DISPLAY/PROGRAM knob is pointed). It will do this for the restart delay time programmed into RD1. Once the timer expires, the relay will energize—the NO contact will close and the NC contact will open. If something other than this is displayed, see the troubleshooting section for more information. If MODE SELECT is taken out of RUN, the 777-MV-P2’s relay will deenergize.

Trip Class Application Description

15 Specialized applications

Small fractional horsepower motors where acceleration times are almost instantaneous or where extremely quick trip times are required

(Fast Trip) Hermetic refrigerant motors, compressors, submersible pumps and general-purpose motors that reach rated speed in less than 4 seconds

(Standard Trip) Most NEMA-rated general-purpose motors will be protected by this setting

(Slow Trip) Motors with long acceleration times (>10 seconds) or high inertia loads

Programming any of the trip classes with the J prefix will enable jam

J Prefix

(Jam Protection)

protection. This additional protection is enabled 1 minute after the motor starts and provides a 2 second trip time for motors exceeding 400% of the OC setting

Non-Standard

Trip Classes

Trip time in seconds when any phase current is 600% of OC. Time is approximately 90% of the TC setting

Table 3: Trip Class Descriptions

10000

1000

100

Trip Time (Seconds)

0 100 200 300 400 500 600 700 800 900 1000

% of OC Setting

Class 30 Class 20

Class 15 Class 10

Class 5

Figure 6: Overload Trip Curves

PROGRAMMING EXAMPLES

NOTE: Since no network communications are connected in these examples there are no setting

changes needed for ADDR or COM.

Example #1

3-phase, 4160 Volt, 400 hp vertical hollow shaft pump with a full load amperage of 56.2A and maximum service factor amps of 61.6A. Three potential transformers (4160/120) have been installed in a wye-wye configuration to allow 3-phase voltage protection. This voltage monitoring will prevent the motor from starting on a reverse-phase, single-phase or unbalance condition.

LV- 120 x 0.90 = 108 HV- 120 x 1.10 = 132 VUB- Manufacturer suggests 3 MULT- From Table No. 1, MULT=75 (with 75:5 CTs) OC- Service Factor Amperage = 61.6 UC- FLA x 0.80 = 56.2 x 0.80 = 45.0 CUB- Manufacturer suggests 5 TC- From Table 3, general purpose motor, TC = 20 Linear Trip = Off RD1- To protect the pump from rapid cycling, setting RD1 = 300 seconds will reduce the

number of starts per hour.

RD2- Because the pump is large, a cool-down time of 30 minutes should be appropriate,

RD2 = 30. RD3/#RU- The well history shows that it will fully recover in two hours. RD3 = 120 minutes. #RF- This well is known for sand to jam the impeller, therefore "oc" should be included so

the pump will automatically restart after an overloaded condition. History shows that 1

start attempt usually clears the sand out of the impeller. #RF = oc1 UCTD- Setting UCTD = 10 will allow normal operation and not allow the motor to run too long

in an undercurrent fault condition. GF- Because it may take several days to get a new pump motor and schedule for

maintenance personnel to remove and replace the pump motor, GF setting of 10% of

full load amperage will give the well owner enough time to prepare for pump

replacement. GF = 56.2A x 0.10 = 5.6.

Example #2

Motor To Be Protected: 3-phase , 4160 Volt, 200 hp air compressor with a full load amperage rating of 27A and maximum service factor amps of 30A. Use the following calculations and reasoning to determine the appropriate settings for this application. One 4160/120 potential transformer is used for control power. Voltage monitoring and reverse-phase protection is not implemented.

LV- 120 x 0.90 = 108 HV- 120 x 1.10 = 132 VUB- Since L3 is not connected, VUB = 999 MULT- From Table No. 1, MULT = 50 (with 50:5 CTs) OC- Service Factor Amperage = 30 UC- FLA x 0.80 = 27A x 0.80 = 21 CUB- Manufacturer suggests 5 TC- General purpose motor, TC = 20 RD1- Since this compressor takes about 60 seconds to bleed off excess pressure after a

shutdown, setting RD1 = 120 seconds will allow the compressor to unload before being restarted.

RD2- Because the motor may be hot from running in an unbalance or single-phase condition,

a motor cool down time of 20 minutes, RD2 = 20, should be appropriate.

RD3- Because an undercurrent would signal a serious problem in this application (a broken shaft

or belt), #RU should be set = 0 for manual reset. Therefore, RD3 has no function. #RU- #RU = 0 (see RD3 setting) #RF- Because an overload (overcurrent) fault signals a serious problem in this application (e.g.,

worn bearings), "oc" should not be included in the #RF setting so that a manual reset after

an overload fault is required. #RF = 1 will give the system 1 chance to recover from an

unbalance or single-phasing problem before a manual reset is required. UCTD- Setting UCTD = 5 will allow normal operation and not allow the motor to run too long in an

undercurrent fault condition. GF- A ground fault setting of 15% of full load amps will be a significant indicator that the motor

should be evaluated for repair or replacement. Thus, GF = 27A x 0.15 = 4.0.

SYSTEM DISPLAY

On power up, the 777-MV-P2 will show the current software revision. For example if the software revision is 33.04, the 777-MV-P2 will show 033 followed by 004.

The output display can show one of the following parameters when MODE SELECT is in RUN: L1L2, L2-L3, and L3-L1 line voltage; %VUB; A, B, and C phase current; %CUB; measured GF current. The display is used for programming the operating parameters of the device and also identifies what caused the unit to de-energize its relay or what is keeping the unit from energizing its relay, and under normal operating conditions, what the last fault was. The last fault can be displayed by pressing and holding the RESET/PROGRAM button while MODE SELECT is in RUN. When the unit trips off or is holding the motor off, the current fault condition will be shown in the display without pressing the button (CAUTION: pressing the reset button at this time will reset the unit). Table 4 lists the fault codes the unit could display.

Displayed

Message

oc Tripped on overcurrent SP

ub uc Tripped on undercurrent CF

GrF Tripped on ground fault

HI A high voltage condition exists (won’t allow motor to start)

Lo A low voltage condition exists (won’t allow motor to start)

rP Incoming phases have been reversed, the motor may run backwards if started

oFF A stop command was issued from a remote source HPr Tripped on high power LPr Tripped on low power CLo Tripped on low control voltage

clr No previous faults Pro Shown when programming using the battery in the RUN position FFF Displayed value is greater than 999 (can be due to incorrect MULT setting)

Meaning

Tripped on current single-phasing or unit won’t start because the voltage is single-phased

Tripped on current unbalance or unit won’t start because the voltage is unbalanced

Tripped on contactor failure (due to faulty contacts or connections on the load side)

Table 4: Fault Codes

TROUBLESHOOTING

The 777-MV-P2 will display a fault code alternating with a number or with “run” when it has tripped. If the unit is showing a fault code alternating with “run,” it is timing down the restart delay. If the fault code is alternating with a number (voltage reading or zero), the unit will not allow the motor to start because there is a problem with the incoming voltage. If the display is showing just a fault code, the unit is in a manual reset mode. This could be because the number of restarts (#RF, #RU) has expired or is not allowed. If the display reads “oFF,” a stop command was issued through the communications network or a remote monitor.

PROBLEM SOLUTION

The unit will not start. Display alternates “rP” with the DISPLAY/PROGRAM parameter value.

The unit will not start. Display alternates “SP”, “ub”, “HI”, or “Lo” with the DISPLAY/ PROGRAM parameter value.

Display alternates “SP”, “ub”, or “oc” with “run.”

Display alternates “uc” with “run.”

Display is showing a solid “SP”, “ub”, or “oc.”

Display is showing a solid “uc.”

Display is showing a solid “CF.”

Display is showing a solid “GrF.”

Display alternates “LPr” 4 with “RUN”

The voltage inputs are reverse-phased. If this is the initial start-up, swap any two of the leads connected to L1, L2, or L3 on the 777MV-P2 to correct the problem. If the overload relay has been previously running, the power system has been reverse-phased.

heck the phase sequence of the incoming power lines. C

Note: L1 must be tapped from conductor Phase A, L2 from B, and L3 from C for correct power factor measurements on remote communications. The incoming voltage is not within the limits programmed in the VUB, HV, and LV settings. Turn the DISPLAY / PROGRAM knob to read each incoming line voltage value. Correct the incoming power problem and check programmed limits by turning MODE SELECT. Compare incoming values for HV, LV, and VUB to setpoints to verify they are correct. The overload relay has tripped on the fault shown on the display and is timing down RD2 before restarting. No further action is required. The overload relay has tripped on undercurrent and is counting down RD3 before restarting. If undercurrent is not a normal condition for this installation, check for broken shafts, broken belts, etc. The unit has tripped on the fault shown and a manual reset is required because of the programmed setting in #RF. Check the system for problems that would produce the single-phase, overcurrent or current unbalance fault, such as a jam. The unit has tripped on undercurrent and a manual reset is required because of the setting in #RU. Check the system for problems that would produce a loss of load such as a broken belt or a lack of liquid to pump. The unit has tripped on current single-phasing, but was not singlephased by the incoming voltage. Check for damaged contacts or loose or corroded wiring connections. A ground fault current greater than the programmed GF value has been detected. Check the motor for insulation breakdown. A manual reset is required to clear this message. Press the RESET/PROGRAM button to perform a manual reset. The overload relay has tripped on low power (LPr) and is timing down RD3 before restarting. If LPr is not a normal condition for this installation, check for loss of liquid, closed valves, broken belts, etc.

PROBLEM SOLUTION

Display is showing a solid “LPr”

Display alternates “HPr” 4 with “RUN”

Display is showing solid

“HPr” Display alternates “CLo” 4

with “RUN” Display is showing solid

“CLo”

CLEARING LAST FAULT

The last fault stored can be cleared on the 777-MV-P2 by following these steps:

1. Rotate MODE SELECT to GF.

2. Press and hold the RESET/PROGRAM button. Adjust the DISPLAY/PROGRAM knob until “cLr” appears on the display. Release the RESET/PROGRAM button.

To verify the last fault was cleared, place MODE SELECT in the RUN position. Then press and hold the RESET/PROGRAM button; “cLr” should be on the display.

TAMPER GUARD

The 777-MV-P2 setpoints can be locked to protect against unauthorized program changes.

1. Rotate MODE SELECT to GF.

2. Press and hold the RESET/PROGRAM button. Adjust the DISPLAY/PROGRAM knob until “Loc” appears on the display.

3. Release the RESET/PROGRAM button.

4. Turn MODE SELECT to RUN.

The program is now locked, but all settings can be viewed. The unit can be unlocked by following the same steps except adjust the DISPLAY/PROGRAM knob to “unL” in step 2.

The unit has tripped on low power and a manual reset is required because of the setting in #RU. Check the system for problems that would produce a loss of load like a broken belt or a pump is out of liquid. Press the RESET/PROGRAM button to perform a manual reset. The unit has tripped on high power and is timing down RD2. Check for a high power condition.

The unit has tripped on high power and requires a manual reset because of the setting in #RF. Press the RESET/PROGRAM button to perform a manual reset. The overload relay has tripped on low control voltage (CLo) and is timing down RD2 before restarting.

The unit has tripped on low control voltage and a manual reset is required because of the setting in #RF. Verify system voltage is correct. Press the RESET/PROGRAM button to perform a manual reset.

LPr, HPr, and CLo are enabled only from a network master via a communications module.

GROUND FAULT TESTING PROCEDURE

A ground fault test must be performed before installing the 777-MV-P2 as required by UL1053

nd NEC, ANSI/NFPA 70. a

1. Disconnect power.

2. Hook up the three line voltages to L1, L2, and L3 as required by the installation instructions.

3. Program the desired parameters into the unit. For test purposes, set MULT to 1 and GF to the minimum allowed setting.

4. Construct the circuit, using an AC power supply. This circuit simulates a ground fault condition by generating a current in one of the phases. Alternate test circuits may be used. The only requirement is the current through the current transformer must be between 115% and 150% of the GF setting and pass through only one CT window.

5. The values of V and R will be determined by the current required to generate a GF trip condition: I = Vrms/R, where I = 115% of GF setting.

6. Place the unit in the RUN position, apply 3-phase power and allow the NO contact to close.

7. Energize the test circuit by pushing and holding the test pushbutton until the unit trips (within 8.5 seconds). The display should show “GrF” and the NO contacts should be open. Release the NO pushbutton.

8. The results of the test are to be recorded on the test form provided below. The form should be kept by those in charge of the building’s electrical installation in order to be available to the authority having jurisdiction.

9. Confirm programmed parameters and proceed with installation instructions.

-----------------------------------------------------

GROUND FAULT TEST RESULTS*

Date Performed by Results Location

*A copy of this form should be retained by the building’s electrical foreman.

777-MV-P2 SPECIFICATIONS

Functional Specifications

Programmable Operating Points LV- Low Voltage Threshold 85-262V HV- High Voltage Threshold 86–264V VUB- Voltage Unbalance Threshold 2-25% or 999 (disable) MULT- CT Ratio (XXX:5) 25, 50, 75, 100, 150, 200, 300, 400, 500, 600, 700, 800 OC- Overcurrent Threshold * See Table 1 UC- Undercurrent Threshold * See Table 1 CUB- Current Unbalance Threshold 2–50% or 999 (disable) TC- Overcurrent Trip Class

RD1- Rapid Cycle Timer 0-999 seconds RD2- Restart Delay After All Faults Except

Undercurrent (motor cool-down timer)

RD3- Restart Delay After Undercurrent (dry-

well recovery timer)

#RU- Number of Restarts After Undercurrent 0, 1, 2, 3, 4, A (Automatic) ADDR- RS485 Address A01–A99 #RF-Number of Restarts After All Faults

Except Undercurrent

COM- Communication setting C00-C07 UCTD- Undercurrent Trip Delay 2–999 seconds GF- Ground Fault Current Threshold* 6-40% of CT Primary or oFF Trip Times Ground Fault Trip Time Trip time

101%-200% of Setpoint 8 seconds ±1 second 201%-300% of Setpoint 4 seconds ±1 second 301%-400% of Setpoint 3 seconds ±1 second 401% or Greater 2 seconds ±1 second

Current Unbalance Trip Times

% Over Setpoint

0% 1% 2% 3% 4% 5% 6% 11% 15%

Input Characteristics

Input Voltage (3-phase) 100-240 VAC Frequency 50/60 Hz Motor Full Load Amp Range 10–800A (with the use of external CTs)

Output Characteristics

Output Contact Rating SPDT (Form C) Pilot duty rating: 480VA @ 240VAC, B300

If a “J” is included in the trip class (TC) setting, jam protection is enabled.

If "oc" is displayed in the #RF setting, overcurrent will be included as an automatic restart after RD2 expires.

Otherwise, a manual reset is required after an OC fault.

2-60, J2-J60, L00-L60, oFF

2–500 minutes

2–500 minutes, A (Automatic)

0, 1, oc1, 2, oc2, 3, oc3, 4, oc4, A, ocA (Automatic)

Trip time 30 seconds 15 seconds 10 seconds

7.5 seconds 6 seconds 5 seconds 4 seconds 3 seconds 2 seconds

General purpose: 10A @ 240VAC

Expected Life

Mechanical 1 x 106 operations Electrical 1 x 105 operations at rated load

General Characteristics

Environmental Temperature Range Ambient Operating: -20° to 70°C (-4° to 158°F)

Pollution Degree 3 Class of Protection IP20 (Finger Safe) Relative Humidity 10-95%, non-condensing per IEC 68-2-3 Accuracy at 25°C (77°F)

Voltage ±1% Current ±3% (<100A direct) Timing ±0.5 second Ground Fault ±15% (< 100A)

Repeatability

Voltage ±0.5% of nominal voltage

Current ±1% (<100A direct) Maximum Input Power 10 W Safety Marks

UL UL508, UL1053

CE IEC 60947-1, IEC 60947-5-1 Standards Passed

Electrostatic Discharge (ESD)

Radio Frequency Immunity (RFI),

Conducted

Radio Frequency Immunity (RFI), Radiated

Fast Transient Burst IEC 61000-4-4, Level 3, 3.5 kV input power Surge

IEC 61000-4-5 Level 3, 2kV line-to-line; Level 4, 4kV line-to-

ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level of

Hi-potential Test Meets UL508 (2 x rated V +1000V for 1 minute)

Vibration IEC 68-2-6, 10-55Hz, 1mm peak-to-peak, 2 hours, 3

Shock IEC 68-2-27, 30g, 3 axis, 11ms duration, half-sine pulse Mechanical Dimensions 3.0" H x 3.6" W x 5.1" D Terminal Torque 7 in.-lbs. Enclosure Material Polycarbonate Weight 1.2 lbs Maximum Conductor Size Through 777-MV-P2 0.65" with insulation

NOTE: The 777-MV-P2 can be programmed prior to installation by connecting a 9V battery. Disconnect power prior to using the battery cable and follow all safety warnings. * Do not program the unit above the thermal rating for the CTs.

Ambient Storage: -40° to 80°C (-40° to 176°F)

IEC 61000-4-2, Level 3, 6kV contact, 8kV air IEC 61000-4-6, Level 3 10V

IEC 61000-4-3, Level 3 10V/m

ground

6kV line-to-line

axis

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