CMR Installation and Operation Manual | Issue: July 2021, Revision 01.0
5
2 Ratings
2.3 Switching ratings
The switching capabilities of the CMR depend upon voltage rating and the number
of phases as follows:
Switch unit parameters Unit , & -phase -phase only
Rated voltage kV up to kV
Rated frequency f
r
Hz / /
Rated continuous current I
r
at °C A
Rated continuous current I
r
at °C A
Rated short-time withstand current I
k
kA . .
Rated peak-withstand current I
p
kA . .
Rated duration of short circuit t
k
s
Rated symmetrical interrupting current I
sc
kA . .
Rated symmetrical fault-making current kA . .
Rated operating sequence
O – . s – CO –
s – CO – s – CO
O – 0.3 s – CO –
2 s – CO – 2 s – CO
Opening/closing times ms < ms <20 ms
Clearing time ms < ms <50 ms
Rated line-charging interrupting current A
Rated cable-charging interrupting current A
Minimum number of operations at rated short-circuit
current
Minimum number of load-break operations at rated
current/mechanical operations
, 10,000
IP rating 67
Creepage distance mm >, >1,185
2.1 Standards
The Compact Recloser ratings shown in table 1 conform to the requirements
of IEC 62771-111 and IEEE Std C37.60.
2.2 Ambient conditions
The CMR is suitable for use in outdoor service environments as follows:
Service environment Rating
Humidity to %
Maximum altitude , m/, ft
Pollution class Very heavy (as per IEC -)
+ °C
- °C
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