UMEB ASA, Operation Manual

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Three-phase squirrel cage induction motors in flameproof enclosure type ASA and E2-ASA
frame size 63 – 355
And they must be carried out on standstill machine, isolated and secured
against reconnection only. Check safe isolation from supply !
Line cables and their installation shall adhere to EN 60079-14.
The motors are provided with six terminals and they may be started either
by network direct connection or by means of star-delta switch or another
starting device limitting the motor starting current. The star-delta starting is
only possible in case of delta working connection.
Warning ! When supplying the motors with increased safety „e” terminal
box, marked accordingly, special care must be given to:

Correct connection of the cables to the terminals by means of
connection devices (see connection diagrams Annex 1), so that the
creepage and clearance distances are closely observed.

Tightening to torque values indicated in paragraph 6.8.2.1 of the electric
connecting devices

Correct mounting of all cable entry devices as well as the terminal box
cover with a view to preserve the motor protection degree.
Warning ! When supplying the motors with flameproof „d” terminal box,
special care must be given to:

Tightening to torque values given under paragraph 6.8.2.2 of the screws
fixing the terminal box cover

Tightening to torque values indicated in paragraph 6.8.2.1 of the electric
connecting devices

Correct mounting of all cable entry devices as well as screwing the
presser according to torque values indicated in tables 2.1 and 2.2.
To connect the supplying cables to the motor terminals, the user should:

take off the cover of the terminal box using an appropriate hex key
wrench

unscrew the presser (thread adapter) using a hexagon wrench, then
take off the compression ring, the wall and the sealing gasket

introduce the supplying cable through the presser, compression ring and
sealing gasket

introduce the cable into the terminal box

put into correct position the sealing gasket, compression ring and the
presser.
When screwing the presser it presses on the sealing gasket and this one,
at its turn, on the cable sheath ensuring thus the sealing of the terminal box

connect the supply cable to the motor terminals;

before connecting the lead to the earth terminal in the terminal box,
clean to white metal the contact surfaces and cover them with a thin layer
of conductible grease