2–22
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
ELECTRICAL INSTALLATION
CHAPTER 2: INSTALLATION
Dielectric strength testing
It may be required to test a complete motor starter for dielectric strength (“flash” or “HI-
POT”) with the MM300 installed.
The MM300 with the I/O Module type C installed (see below) is rated for 1.9 kV AC for 1
second, or 1.6 kV AC for 1 minute (per UL 508) isolation between relay contacts, CT inputs,
VT inputs and the surge ground terminal SG. Some precautions are required to prevent
damage to the MM300 during these tests.
Figure 2-26: Testing for dielectric strength - with IO_C module
The MM300 with the I/O Module type E installed (see below) is rated for 550 V AC for 1
second, or 500 V AC for 1 minute (per UL 508) isolation between relay contacts, CT inputs,
VT inputs and the surge ground terminal SG. Some precautions are required to prevent
damage to the MM300 during these tests.
Do not HI-POT test
HI-POT test at 1.9 kV AC for 1 second, or
1.6 kV AC for 1 minute (per UL 508)
LINE FAULT
ON
POWER
FAULT RESET
kV
VOLTAGE ADJUST
HV ON
DIELECTRIC STRENGTH TESTER
BLACK RED
Remove surge ground during test
*
~14
~13
~12
~11
~10
~9
~8
~7
~6
~5
~4
~3
~2
~1
Au
xV
T
CPU module
E8
E7
E6
E5
E4
E3
E2
E1
Su
rg
e
Gr
ound
D1
D2
D3
D4
D5
D6
D7
D8
CT
Mod
ule
CT1
CT2
CT3
CT4
Power
suppl
y
L N G
MM300
Motor Management S
y
stem
GE Multilin
VT module (optional)
VT
1
VT
3
IO_C
module
RS485
Thermistor
VT
2
Cor
e
balance
Su
rg
e
Gr
ound
853738A3.CDR
+ – C + – R I SG
COM
* *
* * *
Summary of Contents for Multilin MM300
Page 20: ...1 14 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL SPECIFICATIONS CHAPTER 1 INTRODUCTION ...
Page 184: ...6 8 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL COMMANDS CHAPTER 6 DIAGNOSTICS ...
Page 198: ...A 6 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL REPAIRS CHAPTER A APPENDIX A ...