GE MicroVersaTrip Plus Installation Instructions Manual
Conversion kits for allis chalmers, siemens/allis, and siemens la-800[f], and la-1600[f] gold low-voltage power circuit breakers
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Also See for MicroVersaTrip Plus:
- User manual (52 pages) ,
- Installation instructions manual (28 pages) ,
- Manual (2 pages)
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INTRODUCTION
GE Conversion Kits are designed for upgrading
existing Allis Chalmers®, Siemens/Allis®, and
Siemens® low-voltage power circuit breakers, rather
than replacing the entire breaker. The Conversion
Kits include MicroVersaTrip Plus™ or MicroVersaTrip
PM™ Trip Units, the latest technological advance in
GE trip systems.
MicroVersaTrip Plus and MicroVersaTrip PM Conver-
sion Kits are designed and tested to conform to ANSI
Standard C37.59, allowing the retrofitter to properly
install the kit and acceptance test the breaker.
This publication covers installation of
MicroVersaTrip Plus and MicroVersaTrip PM Con-
version Kits on Allis Chalmers®, Siemens/Allis®, and
Siemens® LA-800 and LA-1600 gold low-voltage
power circuit breakers. Each Conversion Kit contains
all the components needed to convert from the
existing trip system.
DEH–40009A Installation Instructions
MicroVersaTrip Plus™ and
MicroVersaTrip PM™ Conversion Kits
for Allis Chalmers
Siemens
LA-800[F], and LA-1600[F] Gold
®
Low-Voltage Power Circuit Breakers
, Siemens/Allis
, and
®
®
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Table of Contents
Related Manuals for GE MicroVersaTrip Plus
Summary of Contents for GE MicroVersaTrip Plus
- Page 1 LA-800[F], and LA-1600[F] Gold ® Low-Voltage Power Circuit Breakers INTRODUCTION GE Conversion Kits are designed for upgrading existing Allis Chalmers®, Siemens/Allis®, and Siemens® low-voltage power circuit breakers, rather than replacing the entire breaker. The Conversion Kits include MicroVersaTrip Plus™ or MicroVersaTrip PM™...
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Page 2: Table Of Contents
TABLE OF CONTENTS SECTION 1. GENERAL INFORMATION ....................... 4 SECTION 2. BEFORE INSTALLATION ......................4 SECTION 3. BREAKER PREPARATION ......................5 SECTION 4. INSTALLING THE CONVERSION KIT ................... 6 Installing and Adjusting the Flux Shifter Assembly ..............7 Installing the Flux Shifter Assembly .................. 7 Flux Shifter Adjustment ..................... - Page 3 19. Trip unit installed on the breaker......................14 20. Neutral sensor outline for LA-800 breakers................... 15 21. Neutral sensor outline for LA-1600 breakers..................16 22. Cabling diagram for MicroVersaTrip Plus™ and MicroVersaTrip PM™ trip units with ground fault on four-wire loads ......................19...
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Page 4: Section 1. General Information
As a service-related consideration, the installation of • Do not work on a closed breaker or a breaker a MicroVersaTrip Plus or MicroVersaTrip PM kit pro- with the closing springs charged. Trip the vides an excellent opportunity to perform normal breaker OPEN and be sure the stored-energy maintenance on the breaker. -
Page 5: Section 3. Breaker Preparation
SECTION 3. BREAKER PREPARATION The following steps are performed to prepare the breaker for installation of the new conversion kit. Unless otherwise indicated, the procedure is the same for both LA-800 and LA-1600 breakers. WARNING: Before installing the conversion kit, turn the breaker OFF, disconnect it from all voltage sources, and discharge the closing springs. -
Page 6: Section 4. Installing The Conversion Kit
SECTION 4. INSTALLING THE CONVERSION KIT This section describes the installation of the Micro- VersaTrip Plus or MicroVersaTrip PM conversion kit. The components provided with the kit are shown in Figure 3. Trip Unit Support Flux Shifter Bracket Mounting Plate Connector Hardware Wiring... -
Page 7: Installing And Adjusting The Flux Shifter Assembly
Installing and Adjusting the Flux Shifter Assembly Use the following procedures to install and adjust the new flux shifter assembly, shown in Figure 4. Numbers in brackets in the text refer to the num- bered parts in Figure 4. The breaker should still be resting on its back from the previous procedure (removing the old components). -
Page 8: Trip Screw Adjustment
Trip Screw Adjustment Adjusting Microswitch Nuts Link With the breaker CLOSED, the trip screw [3] must have zero clearance with the breaker trip paddle. If adjustment is necessary, OPEN the breaker, make the Breaker Reset adjustment, then CLOSE the breaker to check the Link adjustment. - Page 9 Breaker Reset Link Microswitch Link Self-Locking Adjusting Nuts Bolt Flux Shifter Washers Reset Arm Figure 8. Parts sequence for connecting the microswitch link...
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Page 10: Installing The Trip Unit Wiring Harness
Installing the Trip Unit Wiring Harness CAUTION: Pins in the connectors may come loose in shipping. Check all wiring harness connectors to ensure that the pins are tight. Reseat pins as necessary. Use the following procedure to install the trip unit mounting plate onto the breaker. - Page 11 4. Slide the adapter bracket and connector assem- bly over the guide pins of the trip unit bracket. Press the two steel push nuts provided onto the guide pins using a nut driver, as shown in Figure 12, until the assembly is held firmly against the trip unit mounting plate.
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Page 12: Installing The Trip Unit Mounting Plate
Installing the Trip Unit Mounting Plate 1. Attach the trip unit mounting plate to the support bracket, as shown in Figure 14. a. The two larger screws at the top attach to tapped holes in the support bracket. b. Pull out the locking lever, as shown, then insert the small screw through the hole. -
Page 13: Installing The Current Sensors
Installing the Current Sensors The current sensors must be installed differently in the two breaker frame sizes. LA-800 Current Sensors The following procedure is illustrated in Figure 16. 1. Slide two of the current sensors (CTs) over the outer load studs with their terminals pointing upward. -
Page 14: Installing The Communications Harness
SECTION 5. INSTALLING THE TRIP Installing the Communications Harness UNIT The communications harness is used if the trip unit is to communicate with a power management con- Use the following procedure to install the trip unit. trol system. The communications connector, 1. -
Page 15: Section 6. Four-Wire Ground Fault Option
SECTION 6. FOUR-WIRE GROUND FAULT OPTION The ground fault option for four-wire installations requires the installation of an additional current sensor on the neutral bus in the equipment. The sensor is connected to the trip unit through the connector provided in the wiring harness. 1. - Page 16 Figure 21. Neutral sensor outline for LA-1600 breakers.
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Page 17: Section 7 Testing And Trouble-Shooting
Disconnect the black CT wires at each phase performed by wiring two adjacent poles in sensor. series or by using the GE Digital Test Kit, cat. b. Check for continuity with a continuity tester or no. TVRMS2. This will prevent the breaker... - Page 18 from all power sources, perform the following Breaker CT Rating, A Resistance, ohms procedure: 10.1–15.2 1. Check that all phase sensors are the same type LA-600 14.5–22 (current range). 4–58 10.1–15.2 2. Verify that the tap settings on all three phase sen- LA-800 27–41 sors are identical.
- Page 19 Figure 22. Cabling diagram for MicroVersaTrip Plus™ and MicroVersaTrip PM™ trip units with ground fault on four-wire loads.
- Page 20 Should further information be desired or should particular problems arise that are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the GE Company. GE Industrial Systems General Electric Company 41 Woodford Ave., Plainville, CT 06062...