Installation
6 Siemens Energy & Automation, Inc.
Mount the relay using the following steps.
1. Install the relay M1-type case in the panel opening on
the switchgear equipment.
2. Connect the case ground to the terminal lug on the
back of the M1-type case as shown in Figure 2.3.
3. Wire as described in Section 2.4.
Figure 2.3 Case Grounding
2.4 Wiring
Wire the ISGS relay after the case is installed. Connect the
wiring to the applicable terminals to support the desired fea-
tures. Refer to Figure 2.4 for terminal locations. Figure 2.5
shows the internal connections of the ISGS relay. To avoid
injury to personnel or the equipment, perform power connec-
tions after all other wiring has been completed.
Assure that all power is off before performing any wiring. Ter-
minals 1 through 20 accept ring-tongue or forked spade ter-
minals and are suitable for 14 AWG to 10 AWG wire.
Terminals 21 through 60 are for directly inserting the appro-
priate wire and are suitable for 22 AWG to 14 AWG wire.
Communications connections made to terminals 48 to 50
require shielded twisted pair wire.
CT connections should be made with the polarity end of the
CT connected to current terminal marked with an asterisk (*).
Use toothed washers to
ensure solid metal contact
through paint of cover and
panel
Case ground, #12
or braided cable to
good cubicle ground,
as short as possible
IMPORTANT:
Any unused terminals must remain discon-
nected. They are for factory use only.
Figure 2.4 Terminal Locations
20
19
18 16 14 12
17 15 13 11
10
9
8642
7531
Case Ground
41 VT1+
42 VT1-
43 VT2+
44 VT2-
45 VT3+
46 VT3-
47 NC (unused)
48 SEAbus Signal +
49 SEAbus Signal -
50 SEAbus Ref
BO1A 31
BO1B 32
BO2A 33
BO2B 34
AI1+ 35
AI1- 36
AI2+ 37
AI2- 38
AO1+ 39
AO1- 40
BI1A 21
BI1B 22
BI2A 23
BI2B 24
BI3A 25
BI3B 26
BI4A 27
BI4B 28
Trip 3A 29
Trip 3B 30
Top
Relay Disabled 2
Relay Disabled 1
Impedance Sense
Impedance Source
Ground Monitor
BI Trip
BI B Switch
Power Input +
Power Input -
Trip 2
CTN-2
CTN-1*
CT3-2
CT3-1*
CT2-2
CT2-1*
CT1-2
CT1-1*
Trip 1
Trip Common
2
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