BRITISH STYLE–
INDICATORS AND ACCESSORIES
Indicator System
Trip-Indicators
Trip-indicators are available for use in parallel with the main
fuse. They can either be attached to the associated fuse or
mounted separately in panel mounted fuse clips, reference
CL1. A push-on adapter and microswitch attachment is
available for use with the trip indicator to give the facility of
remote indication, reference MAI.
Fuse ratings of 20A and below cannot usually accommodate a trip-indicator.
When a trip-indicator is to be attached to the main fuse an
accessory pack comprising a pair of mounting clips and an
appropriate trip indicator would be required. The clips are
snapped onto the fuse end caps and the indicator is
pressed into clips as shown.
Electrical Specifications
Type
Maximum RMS Voltage
Maximum Peak Voltage
Maximum DC Voltage
Cold Resistance (ohms)
Maximum permissible steady-state current
Interrupting Capacity (RMS Symm.)
Pre-Arcing I2t (A2S)
Total I2t (max volts) (A2S)
B
21
C
6
TI500
500
700
130
0.3
1.5A
100,000
23
46
TI700
700
1000
350
0.45
1.5A
100,000
23
46
A
0.8
E
D
F
6.8
Dimensions in mm
Trip-Indicator Data
Fuse Indicator Kits
Kit. Ref.
EC-250
MC250
EC-600
MC600
MC700
Details
Fuse Mount
Indicator Kits
(Inc. one indicator
and two clips)
RMS
Volts
250
250
660
660
700
For use
with Fuse Ref.
LET
LMT & LMMT
FE, FEE, ET, & EET
FM & FMM
MT & MMT
Ref.
TI250
TI500
TI600
TI700
TI1100
TI1500
TI2000
TI2500
Microswitch Adapter
MAI
NO
NC
Edison is offering a microswitch, complete with adapter for
securing the indicator. The microswitch is provided with
double pole, single throw contacts, having both a normally
open and a normally closed position. A special material has
been employed in the construction of the adapter to provide
reliable operation in the range of temperatures associated
with standard operating conditions and during fuse operation.
NC
NO
Terminal Arrangement
Microswitch and Adapter Type MAI
Current Rating:
AC 50/60Hz resistive load @ 250V RMS
AC 50/60Hz resistive load @ 127V RMS
DC, resistive load @ 110V DC
DC, resistive load @ 30V DC
Maximum Working Voltage:
Contact-to-contact (RMS)
Contact-to-contact (RMS)
Maximum DC Volts:
4A
6A
0.7A DC
2A DC
1000V
1500V
110V DC
Dimensions in mm
90
Dim. “A” (mm)
37.6
47.5
55.7
61.8
98.4
120.6
147.5
198.3
RMS Volts
250
500
600
700
1100
1500
2000
2500
6.35