6 Installation
Messko GmbH 2020 39BA4001150/10 EN MSENSE
®
DGA 2/3
6.3 Electrical connection
This chapter describes the correct electrical connection of the device.
WARNING
Electric shock
Risk of fatal injury due to electrical voltage.
► De-energize the device and system peripherals and take measures to en-
sure that they cannot be switched back on.
Only connect the device to circuits with an external overcurrent protection
device and an all-pole isolating device so that the equipment can be fully de-
energized if required (for service, maintenance, etc.).
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
We recommend the use of a miniature circuit breaker for protecting the sup-
ply circuit:
▪ Rated current: 16 A
▪ Triggering characteristic: C
Conductor cross-section
For the supply circuit, use a conductor cross-section suitable for the overcur-
rent protective device that you have selected and the selected cable length,
but at least 1.5 mm
2
(AWG 15).
Wiring information
Note this procedure for the wiring:
ü To obtain a better overview when connecting cables, only use as many
leads as necessary.
ü Note the connection diagram [►Section 14.4, Page 97].
ü Only use specified cables for wiring. Note the cable recommendation
[►Section 6.3.2, Page 40].
ü Wire the system periphery leads.
1. Strip insulation from leads and wires.
2. Crimp stranded wires with wire end sleeves.
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