GE Gerapid 2607 User Manual page 55

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 mac hine 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 c urrent of 3200 A;
2 Operating v oltage 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 indic ator;
15 With side insulation panels;
16 With hand lever;
17 Without arc chute indicator;
18 Counter not available;
19 Special retrofit c onnectors for Gearapid SE breakers;
20 According to IEC 60947-2 standard.
21 User Manual must be in Polish.
Correct c atalogue code shall be:
2 2 a a
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.
2009-09-02 S47183e rev.03
5 5 R R 5 5 1 1 2 2 0 0 1 1 4 4 0 0 6 6 1 1 0 0 1 1 1 1 1 1 0 0 0 0 3 3 4 4
Design and specifications are subject to change without notice
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