5 Installation and commissioning
42 BA5831400-00 EN
5.4.1.2 Safeguarding the power circuits
You may only connect the device to circuits with an external overcurrent pro-
tective device and an all-pole isolating device so that the equipment can be
fully de-energized if required.
Suitable equipment includes isolating devices in accordance with IEC
60947-1 and IEC 60947-3 (e.g. circuit breakers). Note the properties of the
relevant circuits (voltage, maximum currents) when selecting the circuit
breaker type. In addition, observe the following:
▪ It must be easy for the operator to access the isolating device.
▪ The isolating device must be labeled for the device and circuits to be iso-
lated.
▪ The isolating device may not be a part of the power line.
▪ The isolating device may not interrupt the main protective conductor.
Miniature circuit breaker
You must protect the mains circuits (supply voltage, main switching contacts)
with a miniature circuit breaker. The miniature circuit breaker must have the
following properties:
▪ Rated current: 6A
▪ Triggering characteristic: C
Conductor cross-section
For all mains circuits, use a conductor cross-section suitable for the minia-
ture circuit breaker that you have selected, but at least 1.5mm
2
(AWG16).
5.4.1.3 Cable recommendation
Please note the following Messko GmbH recommendation when wiring the
device:
▪ For the MT-ST160W, MT-ST160WR, MT-ST160W/RM and MT-
ST160WR/RM device versions, the connection cables used must have a
temperature resistance of at least +120°C (ambient temperature max.
+80°C plus intrinsic device heating of +40K).
▪ For the MT-ST160SK and MT-ST160RM device versions, the connection
cables used must have a temperature resistance of at least +105°C (am-
bient temperature max. +80°C plus intrinsic device heating of +25K).
▪ The cables used must be flame-resistant in accordance with
IEC60332-1-2 or UL2556VW-1.
To Next Page
Loading...
Need help?
General
