Symcom 777-LR-TS Engineering Specification

ENGINEERING SPECIFICATION

SYMCOM MODEL 777-LR-TS Electronic Overload Relay

PART 1 GENERAL

1.1 REFERENCES

A. UL 508 Industrial Control Equipment – Underwriters Laboratories
B. IEC 60947 Low Voltage Switchgear and Controlgear – International Electrotechnical Commission
C. CSA C22.2 No. 14 Industrial Control Equipment – Canadian Standards Association
D. ANSI/IEEE C62.41 – American National Standards Institute/Institute of Electrical & Electronics Engineers
E. MODBUS over Serial Line Specification and Implementation Guide V1.02
F. UL 1053 Ground-Fault Sensing and Relaying Equipment – Underwriters Laboratories

1.2 WARRANTY

A. Manufacturer Warranty: The manufacturer shall guarantee the overload relay to be free from material and workmanship defects

PART 2 PRODUCTS

2.1 MANUFACTURERS

The equipment specified shall be the Model 777-LR-TS, manufactured by SymCom, Inc.

2.2 DESCRIPTION

2.3 PERFORMANCE/DESIGN CRITERIA: 3-PHASE ELECTRONIC OVERLOAD RELAY

for a period of five years from the date of manufacture when installed and operated according to the manufacturer’s requirements.

A . Regulatory Requirements:

1 . The equipment shall be UL Listed as type NKCR—Industrial Control Equipment-Motor Controllers-Auxiliary Devices.

2. The equipment shall be ULC Listed as type NKCR7—Industrial Control Equipment-Motor Controllers-Auxiliary Devices
Certified for Canada.

3. The equipment shall be CE marked for use in the European Union and evaluated against IEC 6094 7 Low Voltage Switchgear
and Controlgear.

4. The equipment shall be CSA certified as class 3211-03—Industrial Control Equipment-Motor Controllers-Auxiliary Devices.

A . Protective Relay Functions

1. The equipment shall provide protection against the following conditions:
a. voltage single phase/phase loss
b. phase reversal
c. low voltage
d. high voltage
e. voltage unbalance
f. rapid cycling to prevent on-off cycling of the motor in rapid succession
g. undercurrent
h. overcurrent
i. current unbalance
j. current single phase/phase loss
k. ground fault
l. contact failure, to trip the motor, if the motor starter is damaged which causes a current single phase.
m. hot/temperature sensing

B . Communication Capabilities

1. The equipment shall provide Modbus RTU communications capabilities when combined with the appropriate SymCom
network communications modules. Visit www.symcom.com for the current list of communication modules.

2. The equipment interface shall have the capability of connecting to the following systems:
a. HMI (Human Machine Interface)
b. SCADA (Supervisory Control and Data Acquisition) programs.
c. DCS (Distributed Control System)
d. PLC (Programmable Logic Controllers)

3. The equipment shall support 9600 baud, Even parity, and 1 stop bit.

4 . The equipment shall provide set points that are readable and writable via the Modbus interface.
5 . The equipment shall provide the ability to energize and de-energize the motor via the Modbus interface.

1

1

Temperature sensing trip feature supported by Subtrol® -equipped pumps. Subtrol® is a registered trademark of Franklin Electric Co., Inc.

ES-777-LR-TS 05/2010

6 . The equipment shall provide a 10-second Modbus network watchdog to trip the relay when Modbus communication is lost.

C . Network Capabilities

1. The equipment shall provide registers to read the following real-time values:
a. L1-L2 line voltage
b. L2-L3 line voltage
c. L3-L1 line voltage
d. Average line voltage
e. Phase A current
f. Phase B current
g. Phase C current
h. Average phase current
i. Voltage unbalance
j. Current unbalance
k. Current multiplier
l. Power factor
m. Ground fault current
n. Restart Delay 1 (RD1) Time Remaining
o. Restart Delay 2 (RD2) Time Remaining
p. Restart Delay 3 (RD3) Time Remaining
q. Power in KW
r. Trip status of the following:

1) Manual reset status

2) Network off command status

3) Contact failure

4) Undercurrent

5) Overcurrent

6) Ground fault

7) Current unbalance

8) Current single phase

9) Temperature sensing

s. Status of the following:

1) Low voltage pending

2) High voltage pending

3) Voltage unbalance pending

4) Undercurrent pending

5) Reverse phase pending

6) Current unbalance pending

7) Voltage single phase pending

8) Current single phase pending

9) Over current pending

10) Ground fault pending

11) Relay status
t. Last fault 1
u. Last fault 2
v. Last fault 3
w. Last fault 4
x. Unit ID
y. Model code
z . Motor run hours

2. The equipment shall provide the following readable/writable setpoints:
a. Low voltage trip point
b. High voltage trip point
c. Voltage unbalance trip point
d. Current multiplier, used to scale the current reading properly when Current Transformers (CTs) or amp turns are

used
e. Overcurrent trip point
f. Undercurrent trip point
g. Current unbalance trip point
h. Trip class setpoint
i. Restart delay 1 setpoint
j. Restart delay 2 setpoint
k. Restart delay 3 setpoint
l. Number of restarts after an undercurrent fault (#RU) setpoint
m. Number of restarts after a fault (#RF) setpoint
n. Undercurrent trip delay setpoint
o. Ground fault trip point
p. Modbus address setpoint
q. Temperature sensing on/off
r. Trip enable setpoint to enable the following:

ES-777-LR-TS 05/2010