Ordering - GE B90 Instruction Manual

2 PRODUCT DESCRIPTION
A
B
C
CB 1
8 PHASE A
CURRENTS
A B90 protection system consists of several UR-series B90 IEDs as per user needs and system configuration. At least
three IEDs are required to provide differential and other protection functions for phases A, B, and C of the busbar. The
fourth IED is required for breaker failure functionality and isolator status monitoring as well as extra input and output capa-
bility. A fifth IED is sometimes required for additional input and output capability.
Before ordering the B90 system, an analysis of the required protection and monitoring functions is required. Please refer to
the UR overview section in chapter 1 for details of the B90 architecture. Also, detailed analyses of required AC inputs and
input/output contacts must be performed to select appropriate hardware configurations for each of the B90's IEDs.
The B90 Low Impedance Bus Differential System is provided with an option of protecting either 8, 16, or
24-feeder busbars. When ordered as an eight-feeder protection system, the B90 is configurable for up to
eight-input bus differential, regardless of the number of physical current inputs available in the B90 IEDs.
The ordering convention for each of the B90 IEDs is described below.
The relay is available as a 19-inch rack horizontal mount unit and consists of the following modules: power supply, CPU,
CTs and VTs, digital inputs and outputs, and inter-relay communications. Each of these modules can be supplied in a num-
ber of configurations specified at the time of ordering. The information required to completely specify the relay is provided in
the following tables (see chapter 3 for full details of relay modules).
Order codes are subject to change without notice. Refer to the GE Multilin ordering page at
http://www.GEindustrial.com/multilin/order.htm
NOTE
GE Multilin
CB 2
...
8 PHASE B
CURRENTS
Figure 2–11: APPLICATION TO 8-FEEDER BUSBARS
for the latest details concerning B90 ordering options.
B90 Low Impedance Bus Differential System
2.1 INTRODUCTION
ZONE 1
ZONE 2
ZONE 3
CB 7 CB 8
8 PHASE C
CURRENTS
836768A1.CDR
2

2.1.2 ORDERING

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