GE Consumer & Industrial - G E Power Controls

7.2.3 Example of order no. 3
Customer wants to use Gerapid as a field discharge breaker to commutate current
from excitation system of synchronous machine to the discharge resistor circuit.
Customer has previously tested one Gerapid breaker in a special test sequence using
special ratings and internal standard “XXX 123”. Customer requests to put on the
nameplate rated parameters that have been tested. After agreement with GE both
parties decided to create special version of the breaker and assign to it a letter “a” as
extension of standard name. These breakers will be a retrofit units replacing old
Gearapid SE type.
1 Load current of 3200 A;
2 Operating voltage of 2750 V;
3 High power, low stability, source 220 V AC available for closing solenoid;
4 Terminals suitable to install SEL current measurement system.
5 Plus pole connected to the TOP terminal;
6 With SEL measurement system;
7 Without OC release;
8 Low power, high stability, 24 V DC source available for control supply;
9 With maximum possible number of auxiliary contacts.
10 Without OC trip target;
11 Zero voltage release;
12 With ED impulse release supply directly from external C-bank;
13 Without forced tripping release;
14 With contacts’ position indicator;
15 With side insulation panels;
16 With hand lever;
17 Without arc chute indicator;
18 Counter not available;
19 Special retrofit connectors for Gearapid SE breakers;
20 According to IEC 60947-2 standard.
21 User Manual must be in Polish.
Correct catalogue code shall be: 2 a 5 R 5 1 2 0 1 4 0 6 1 0 1 1 1 0 0 3 4
General remarks:
Customer’s special solution with non-typical ratings. Additional letter “a” will be
assign to this configuration exclusively. Later customer can use this letter to call
the same configuration.
It is possible to supply closing drive and controls from two separate source of
power.
2012-11-21 S47183R01E06 Design and specifications are subject to change without notice 55