nord NORDAC START Series, User Manual, Page: 38 / 120

NORDAC START (SK 135E / SK 175E) – Users Manual for Motor Starters
38 BU 0135 en-4118
2.3 Electrical Connection
WARNING
Electric shock
Dangerous voltages can be present at the mains input and the motor connection terminals even when the device
is not in operation.
• Before starting work, check that all relevant components (voltage source, connection cables, connection
terminals of the device) are free of voltage using suitable measuring equipment.
• Use insulated tools (e.g. screwdrivers).
• DEVICES MUST BE EARTHED.
Information
Temperature sensor and PTC (TF)
As with other signal cables, thermistor cables must be laid separately from the motor cables Otherwise the
interfering signals from the motor winding that are induced into the line affect the device.
Ensure that the device and the motor are specified for the correct supply voltage.
The housing cover must be removed from the device in order to make the electrical connection (

Section 2.1.1 "Work procedures for motor installation").
One terminal level is provided for the power connections and one for the control connections.
The PE connections (device earth) are located on the power connections for the motor and the mains,
as well as on the base inside the cast housing.
The terminal strip assignments differ according to the version of the device. The correct assignment
can be found on the inscription on the respective terminal or the terminal overview plan printed inside
the device.
Connecting terminals for
(1) Mains cable (X1.1)
(2) Motor cable (X2.1)
(3) Electro-mechanical brake cables (X3)
(4) Control lines (X4)
(SK 175E only)
(5)
Control lines (X5)
and motor PTC
(7) PE (X1.2 and X2.2)