Supplementary installation, operating and maintenance instructions English
Explosion-proof three-phase asynchronous motors with squirrel-cage rotor for high voltage
815001 Edition 09.2020
7
avoid them. They must be authorised by the person responsible for the safety of the installation to carry out
the necessary work and activities.
Before starting work, the following 5 safety rules must always be applied:
Disconnect
Secure to prevent restarting
Ensure absence of voltage
Ground and short circuit
Cover or cordon off adjacent live parts
Auxiliary circuits (e.g. standstill heating) must also be disconnected.
Exceeding the limit values of area A in IEC/EN 60034-1/ DIN VDE 0530 -1
– voltage ±5%, frequency ±2%,
waveform, symmetry
– leads to increased heating. Observe the information on the rating plate and the wiring
diagram in the terminal box. The connection must be made in such a way that a permanently safe electrical
connection is maintained. Only approved cable end fittings must be used. Safe equipotential bonding must
be established and ensured.
Air gaps between bare, live parts and to earth must not fall below the following values:
36 mm for U
N
≤ 3.2 kV,
60 mm for U
N
≤ 6.3 kV
The working voltage may exceed the specified voltage level by 10%.
There must be no foreign bodies, dirt or moisture in the terminal box.
For a test run without output elements, the feather key must be secured.
High-voltage machines with accessories must be checked for proper function before commissioning.
Proper installation (e.g. spatial separation of signal lines and power
cables, shielded
lines and cables, etc.) is the responsibility of the system
operator.
Unventilated motors without integral fans are cooled by free convection with cooling fins on the motor hous-
ing. Adequate safety to prevent inadmissible heating is ensured by power reduction/winding adjustment and
proven by means of type testing/submission. Free convection must be ensured to maintain the temperature
class and the permissible operating temperature. The motor must not be enclosed.
Compare current type, mains voltage and frequency!
Pay attention to the circuitry!
Observe rated current for circuit breaker setting!
For motors in ignition protection type
increased safety “e” the t
E
time must be observed!
Connect the motor according to the terminal diagram provided in the terminal box!
For earthing, there is an earth terminal on the housing or on the flanged bearing plate, depending on the de-
sign. All motors also have a protective conductor terminal inside the terminal box. Unused cable glands in
the terminal box must be closed to protect against dust and moisture. General safety and commissioning in-
structions apply to electrical connection. The cable glands and connection screws must be approved for Ex
atmospheres. The installation torques, sealing ranges and clamping ranges for strain relief specified by the
gland manufacturer must always be observed. Connecting cables must be selected in accordance with DIN
VDE 0100, taking into account the rated current and system-dependent conditions (e.g. ambient tempera-
ture, type of installation, etc. in accordance with DIN VDE 0298 or IEC/EN 60204-1).
At room temperatures of more than 40°C, cables with a permissible operating temperature of at least
90°C must be used. This also applies to motors for which the data sheet/supplement to the EU (EC)
Type Examination Certificate refers to special requirements for cable design.
When connecting motors, special care must be taken to ensure that the connections in the
terminal box are made correctly. The nuts on the connection screws must be tightened without exerting
force
.
Creepage and clearance distances according to IEC/EN 60079-0/60079-7 must be observed.
Tightening torques for production and testing
Screw connections ungreased
Bolt connections
Cu / Ms
Strength 4.6 and 5.6
or screws made of
Cu, Ms, Al, GG
Strength 8.8
- Mech. without lock
- Busbars with lock
Strength 8.8
- Mech. with lock
Dimen-
sions
Manufactur-
ing
[Nm]
Testing
[Nm]
Manufac-
turing
[Nm]
Testing
[Nm]
Manufactur-
ing
[Nm]
Testing
[Nm]
Manufactur-
ing
[Nm]
Testing
[Nm]
