Basler Electric VR63-4C-UL User Manual

CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPAN Y, HIGHLAND, IL. IT IS LOANED FOR CONFIDENTIAL USE, SUBJECT TO RETURN ON REQUEST, AND WITH THE MUTUAL UNDERSTANDING THAT IT WILL NOT BE USED IN ANY MANNER DETRIMENTAL TO THE INTEREST OF BASLER ELECTRIC COMPANY.
INSTRUCTION MANUAL
FOR
VOLTAGE REGULATOR
Model: VR63-4C/UL
Publication:
9253700991
© 1998, Basler Electric Co., Highland, IL 62249
Revision: E September 1998 ECO: 143
First Printing March 1991
BASLER ELECTRIC, BOX 269, HIGHLAND, IL 62249 PHONE 618/654-2341 FAX 618/654-2351
INTRODUCTION
The VR63-4C/UL Voltage Regulators are designed for use on 50/60 Hz brushless generators. The regulator includes frequency compensation, overexcitation shutdown, a solid-state build-up circuit, and EMI filtering.
WARNING
ELECTRICAL SPECIFICATIONS DC Output Power:
4 Adc at 63 Vdc (252W) maximum continuous, 7 Adc at 100 Vdc (700W) forcing one minute
Weight:
10 oz. (0.28 kg) Net.
FUSES
It is recommended that fuses with high interruption capability be installed per the interconnection diagram to protect wiring from faults before the regulator. Refer to the
Interconnection Diagrams.
NOTE
Fuse must be installed per the interconnection diagrams to avoid inter­rupting the field current.
MOUNTING
The regulator may be mounted in any position. Refer to the
Drilling Diagram
.
For 50 Hz system, the regulator is preset at the factory for a 45 Hz “corner frequency”. For 60 Hz systems, a 55 Hz “corner frequency”. is achieved by cutting the external Hz jumper wires on the generator. Be sure to insulate the two wires so that they are not exposed.
(at 120 Vac input).
Exciter Field DC Resistance: 15 ohms minimum; 100 ohms maximum.
AC Power Input:
Operating range: 85 Vac to 139 Vac, Single phase, 50/60 Hz +
5%, Burden 450 VA.
Sensing Input:
85-139 Vac, Single phase, 50/60 Hz +5
%,
common with AC Power Input.
Voltage Adjust Range:
85-139 Vac.
Regulation Accuracy:
Better than ±1.0% no load to full load.
Response Time:
Less than 1.5 cycles for ±5% change in sensing voltage.
EMI Suppression:
Frequency Compensation Curves
OVEREXCITATION SHUTDOWN
If the exciter field voltage exceeds 95 ±5 Vdc, the regulator automatically removes the field current after a time delay. The time delay is inversely proportional to the magnitude of the detected overvoltage condition up to the 140 Vdc point. Beyond 140 Vdc, the field voltage is removed within 0.2 seconds.
After shutdown, reset the regulator by decreasing voltage below 6 Vac either by stopping the prime mover or interrupting the regulator input with a reset switch for 2 seconds or more.
Internal electromagnetic interference filter (EMI filter).
Overexcitation Shutdown:
Output power is removed under the following conditions: Exciter field voltage exceeds 95+
5 Vdc for a time inversely proportional to voltage magnitude, or within 2 seconds if the exciter field voltage exceeds 140+
5 Vdc.
Voltage Build-up:
Internal provisions for automatic voltage build­up from generator residual voltages as low as 6 Vac.
Power Dissipation:
12 Watts maximum.
PHYSICAL SPECIFICATIONS
Operating Temperature:
-40° C (-40° F) to +60° C (+140° F).
Storage Temperature:
-65° C (-85° F) to +85° C (+185° F).
Vibration:
Withstands 1.2 Gs at 5 to 26 Hz; 0.036" double amplitude at 27 to 52 Hz; and 5 Gs at 53 to 1000 Hz.
Shock:
Withstands up to 20 Gs in each of three mutually perpendicular axes.
Drilling Diagram
EXCITER FIELD POWER CIRCUIT (wires F+ and F-).
Connect the regulator wire F+ to the brushless exciter field terminal F+, and wire F- to terminal F-.
CAUTION
The dc resistance of the exciter field must be equal to or greater than 15 ohms and less than 100 ohms.
POWER/SENSING INPUT CIRCUIT (wires 3 and 4)
Connect as shown by the
Interconnection
Diagrams.
Power for the exciter field and regulator circuitry is derived from the generator output or auxiliary winding. The operable power input range is 85 to 139 Vac and is connected to Terminals 3 and 4.
FREQUENCY COMPENSATION
The frequency compensation characteristic is to improve system load pickup performance by restraining voltage recovery until frequency has also started to recover.
Typical Time Delay Characteristic Curves
VOLTAGE ADJUST
Screwdriver adjustable potentiometer adjusts generator output voltage. Adjustment CW increases voltage.
When using remote voltage adjust rheostat (VAR), the VAR wire on the regulator should be cut and the rheostat connected to both ends. A 1 kohm and ½ watt resistance is adequate for most applications. See
Interconnection Diagrams.
STABILITY ADJUST
An internal screwdriver adjustable potentiometer provides adjustment to the response rate of the generator output voltage
to a change in load. Clockwise rotation of this adjustment provides an increase in the response time and therefore decreases the amount of voltage overshoot (increased stability). Counterclockwise rotation of this adjustment provides a decrease in the response time (faster response time) and therefore increases the amount of voltage overshoot (decreased stability).
OPERATION
The following system operation procedures provide instructions for adjusting the VR63­4C/UL Voltage Regulator.
CAUTION
Meggers and high potential test equipment must not be used. Incorrect use of such equipment could damage the semiconductors contained in the regulator.
PRELIMINARY SET-UP
To prevent damage to the regulator, complete the following steps before proceeding with system start-up.
a. Verify that the voltage regulator
specification conforms with the generator system requirements.
b. Ensure that the regulator is correctly
connected to the generator.
See
Interconnection Diagrams.
c. Install fuses per
FUSES
paragraph.
d. Set the regulator VAR fully CCW and the
remote VAR (if used) to centered.
SYSTEM START-UP
a. Start the prime mover and bring up to
rated speed. Voltage should buildup. If a minimum residual of 6 Vac is not present, perform field flashing.
b. Slowly adjust VAR CW until voltage
reaches nominal value. If used, adjust remote VAR to set generator output to exact value desired.
OPERATIONAL TEST
a. Connect the test setup as shown in
Operational Test.
Do not apply power.
b. Adjust regulator VAR and/or remote VAR
to maximum CCW. c. Apply 120V, 50/60 Hz power to regulator. RESULT: Light bulb should flash momentarily. d. Slowly adjust the regulator VAR control
CW.
Operational Test
RESULT:
1) Before minimum brilliance is reached, the light bulb should reaches maximum brilliance to signify the regulating point.
2) At the regulating point, a small change in the VAR should turn the light bulb on or off.
FIELD FLASHING
When the regulator is operated with the generator for the first time, the polarity of residual magnetism may not be correct or the magnitude not enough. If the generator does not build-up after startup, shut down the prime mover and proceed with the following steps:
a. With the prime mover at rest, apply a dc
source (not grounded) of not more than 12V, to terminals F+(positive) and F- (negative) in series with a limiting resistor of 3-5 ohms.
b. Allow approximately 3 seconds before
removing the dc source.
c. Start prime mover and measure voltage
at regulator leads 3 and 4. If voltage is greater than 6 volts, voltage build-up should be successful. Repeat field flashing procedure if less than 6 V residual is measured.
d. If repeating steps 1 and 2 does not result
in generator voltage build-up, replace the voltage regulator.
ACCESSORY EQUIPMENT
Voltage Adjust Rheostat for remote mounting ­Order Basler P/N 17724 for locking, slotted shaft rheostat.
Interconnection Diagram, 208/240 V Nominal, 3-Phase, 4-Wire
Interconnection Diagram, 240 V Nominal, 3 Phase, 3-Wire
Interconnection Diagram, 120/240 V Nominal, Single-Phase with Neutral
Interconnection Diagram, 120 V Nominal, Single Phase
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