587 / 759
Technical Hotline
+44 (0)1268 563720
CIRCUIT PROTECTION
587
RATING SPECIFICATION
RATING RCBO TRIPPING
CURRENT
LIST NO.
TYPE B
LIST NO.
TYPE C
6A, 230V
30mA 7932s
8932s
10A, 230V
30mA 7933s
8933s
16A, 230V
30mA 7934s
8934s
20A, 230V
30mA 7935s
8935s
32A, 230V
30mA 7936s
8936s
40A, 230V
30mA 7937s
45A, 230V
30mA 7938s
50A, 230V
30mA 7939s
Sentry Technical
Residual Current Breakers with
Overcurrent Protection (RCBOs)
Installation
Sentry RCBOs may be installed anywhere along the length of the busbar and will
occupy one outgoing way.
Selection of the most suitable RCBO should take into account the following
considerations:
1. Operating voltage and frequencies
2. Fault breaking capacity
For applications where the prospective fault current is in excess of this, a BS 1361,
100A (maximum) fuse should be used upstream of the RCBO to provide a system
breaking capacity of 16,000A.
3. Cable protection
The current carrying capacity of the cable should always exceed the current rating
of the RCBO, to prevent damage. However, should this not be the case, a further
calculation may show that the RCBO can still interrupt the current in a sufficiently
short time to prevent overheating of the cable insulation. Although this will prevent
mechanical damage to the cables, further overload protection should be provided by
a separate device, e.g. a motor overload relay.
In case of doubt please contact the Technical Sales and Service Department.
Dimensions (mm)