® ® 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 Entelliguard TU™, MicroVersaTrip Plus™ or MicroVersaTrip PM™ Trip Units, the latest technological advance in GE trip systems.
TABLE OF CONTENTS Section 1. General Information ......................Page 3 Section 2. Before Installation ........................ Page 3 Section 3. Breaker Preparation ......................Page 4 Section 4. Installing the Conversion Kit ....................Page 5 Installing Flux Shifter Reset Bracket ......................Page 6 Installing ththe Trip Unit Wiring Harness .....................
LIST OF FIGURES 1. Primary disconnects removed from the bottom studs....................Page 4 2. Components supplied with the conversion kit......................Page 5 3. Old and New Reset Assembly..........................Page 6 4. Installed Reset Assembly............................Page 6 5.
Before starting any work, turn off and lock out all power sources leading to the breaker, both primary and secondary. GE Conversion Kit installation is straightforward, but does Remove the breaker to a clean, well-lighted work area. require careful workmanship and attention to these instructions.
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 LA-3000 Gold, LA- 4000 Gold, RL-3200 and RL-4000 breakers. WARNING: Before installing the conversion kit, turn the breaker OFF, disconnect it from all voltage sources, and discharge the closing springs.
SECTION 4. INSTALLING THE CONVERSION KIT This section describes the installation of the Entelliguard, MicroVersaTrip Plus and MicroVersaTrip PM and conversion kit. The components provided with the kit are shown in Fig 2. Mounting Plate Flux Shifter Programmer Assembly Bracket Assembly Connector Hardware Wiring Harness...
Installing Flux Shifter Reset Bracket Mount Flux Shifter assembly to breaker frame as shown in figures 6 and 7. Replace existing reset bracket with new bracket as shown in Figure 3 and Figure 4 below: Existing hardware to be used to install Old Reset Asm new reset Asm to be removed...
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 wiring harness to the mounting plate.
Figure 11. Adapter bracket locking tabs 4.Slide the adapter bracket and connector assembly over the Figure 12. Installing the push nuts onto the guide pins 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.
Installing the Trip Unit Mounting Bracket Install Trip Unit mounting bracket as shown in figure 14 and secure in this position with locking plate shown in Figure 15. Figure 14: Trip Unit bracket mounting Hardware ¼-20 Hex Hd ¾ Lg Plain Washer &...
Installing the Current Sensors Next install the wire harness to the Current Sensors as Install current sensors as shown in Figure 16 and 17. shown in Figure 18 below: Figure 18: Installing Wire Harness Figure 16: Position of current sensors Connect the CT leads from the trip unit harness to each of the CT’s.
Installing the Communications Harness SECTION 5. INSTALLING THE TRIP The communications harness is used if the trip unit is to communicate with a power management control system. UNIT The communications connector, included in the trip unit Use the following procedure to install the trip unit. wiring harness, is mounted with the supplied angle bracket.
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.
Figure 21. Neutral sensor outline for 3000A through 4000A breakers SECTION 7. TESTING AND TROUBLE- SHOOTING CAUTION: In addition to the continuity test described in Step WARNING: Do not change taps on the current sensors or 1 and before performance testing of the converted breaker, adjust the trip unit settings while the breaker is carrying each phase of the breaker should be primary injected with a current.
Verify that the neutral conductor is carrying only the neutral current associated with the breaker’s load CAUTION: Do not attempt to use GE Test Kit cat. no. current (the neutral is not shared with other loads). TVTS1 or TVRMS on Entelliguard trip unit and do not use 5.
These instructions do not cover all details or variations in equipment nor do they provide for every possible contingency that may be met in connection with installation, operation, or maintenance. 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...