Page 28
MR-REF & MR-REF3 Technical Manual
Issue 3, November 2013
Appendix 1
MR-REF – MR-REF3 Installation.
The MR-REF & MR-REF3 is supplied in a withdrawable case suitable for flush mounting as detailed below. The
control and CT cable should be stranded copper core of 0.5 to 2.5mm
2
.
The rear terminal block accepts both pre-insulated screw and push on blade type connectors. Each terminal having
1x M4 screw type and 2x 4.8mm blade type complying BS5057.
Wiring torque of M4 screw should not exceed:
0.5 – 0.6 Nm
The MR-REF & MR-REF3 has been designed for installation on to open type panels, for use on the flat surface of a
type 1 enclosure and for installations where the ambient temperature does not exceed 60
0
C.
1
7
8
m
m
D
O
O
R
S
W
IN
G
215.00 mm
FITTED with 12mm M4 STUDS
34.00 mm
A
N
Y
F
IT
T
E
D
P
U
S
H
B
U
T
T
O
N
S
P
R
O
J
E
C
T
L
E
S
S
T
H
A
N
1
0
m
m
MIN 25mm
FOR CABLE
CLEARANCE
4
5
.0
0
m
m
1
6
8
.0
0
m
m
1
5
8
.0
0
m
m
ø 4.30 mm
1
7
8
.0
0
m
m
52.00 mm
98.00 mm
102.00 mm
23.00 mm
75.00 mm
