Ground Fault Sensing And Relaying - Siemens SBA 800 Information And Instruction Manual

External Accessories

Ground Fault Sensing and Relaying

This system will provide Class 1 ground fault protection as
described in UL STANDARD 1053. GROUND-FAULT SENS-
ING AND RELAYING EQUIPMENT.
System Components
UL Listed Circuit Breaker Components and Accessory Com-
ponents
1. Circuit Breaker Table 2
2. Trip Unit- Table 1
3. Rating Plug- Table 3
4. GF Monitor Module SBGFM
5. Display Module Relay Table 4
or Remote Indicator Panel- SBRIP120
6. Shunt Trip Device- Table 5
Table 1- Trip Unit
SB04TLI SB12TLI
SB04TLS SB12TLS
SB04TLSI SB12TLSI
SB04TLIG SB12TLIG
SB04TLSG SB12TLSG
SB04TLSIG SB12TLSIG
SB08TLI SB16TLI
SB08TLS SB16TLS
SB08TLSI SB16TLSI
SB08TLIG SB16TLIG
SB08TLSG SB16TLSG
SB08TLSIG SB16TLSIG
Table 2-Circuit Breaker
SBA0804 SBS0804 SBH0804
SBA0808 SBS0808 SBH0808
SBA1212 SBS1212 SBH1212
SBA2016 SBS2016 SBH2016
SBA2020 SBS2020 SBH2020
SBS4025
SBS4032
SBS4040
Table 3-Rating Plug
04SB200 04SB400 12SB600
04SB225 04SB450 12SB700
04SB250 04SB500 12SB800
04SB300 04SB600 12SB1000
04SB350 04SB700 12SB1200
04SB400 04SB800
20SB1000 25SB1600 32SB1600
20SB1200 25SB2000 32SB2000
20SB1600 25SB2500 32SB2500
20SB2000 32SB3000
System Description:
This Ground Fault Relaying system is based on the Type SB
insulated case circuit breaker. The breaker must be equipped
with an electronic Trip Unit and Rating Plug. The trip unit can
be the type with or without the built-in ground fault tripping
function. The breaker must also have a GF Monitor Module, a
Shunt Trip Device, and either a Display Module Relay or
Remote Indicator Panel. For a system completely enclosed
within the breaker case, the internally mounted Display Mod-
ule Relay is used . If remote cause of trip information is
required, the Remote Indicator Panel may be used in place of
the Display Module Relay.
64
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SB20TLI SB32TLI
SB20TLS SB32TLS
SB20TLSI SB32TLSI
SB20TLIG SB32TLIG
SB20TLSG SB32TLSG
SB20TLSIG SB32TLSIG
SB25TLI SB40TLI
SB25TLS SB40TLS
SB25TLSI SB40TLSI
SB25TLIG SB40TLIG
SB25TLSG SB40TLSG
SB25TLSIG SB40TLSIG
Table 4-Display
Module
SBDMR24
SBDMR48
SBDMR120
SBDMR125
Table 5-Shunt Trip
16SB800
SBST12 SBST120
16SB1000
SBST24 SBST240
16SB1200
SBST48 SBST480
16SB1600
SBST125
40SB2000
40SB2500
40SB3000
40SB3200
Ground Fault Relaying System
System Operation:
The user must first set the desired ground fault pickup and
delay settings on the Ground Fault Monitor Module (Page 63).
These settings are independent from the trip unit built-in
ground fault settings (if available). When a ground fault above
the selected pickup occurs, the breaker will delay based on
the module settings and when the proper time has elapsed.
Issue a signal to the internal Display Module Relay or External
Remote Indicator Panel. The output contacts of the relay can
then be used to trigger the Shunt Trip Device, thus tripping the
circuit breaker.
Testing:
General Instructions
1. The interconnected system shall be evaluated when
initially installed by qualified personnel. It is also recom-
mended that this be done periodically thereafter.
2. The proper location of the sensors around the bus of the
circuit to be protected shall be determined. This can be
done visually with knowledge of which bus is involved.
3. The grounding points of the system shall be verified to
determine that ground paths do not exist that would
bypass the sensors.
4. The polarity of the sensor connections must agree with
the installation instructions to avoid improper operations.
5. A simulated test is to be done using a low voltage, high
current source. This test is not intended to verify that it is
properly functioning.
6. The results of this testing should be recorded on the form
provided at the end of this document or other appropriate
forms and should be available to the inspection authority.
7 . These breakers may be set for different modes of opera-
tion. Residual or Ground Return, as described in the
information on applications, refer to the NEMA standards
publication No. PB 2.2 Application Guide for Ground
Fault Protective Devices for Equipment.