Explosion-protected electric motors - Hew-hf.de

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Motor protection 1/22 Three-phase A.C. motors The motor protection must be provided in line with EN 60079-14. The motors must be protected with a motor protection switch or equivalent equipment on all poles to prevent inadmissible heating due to overload. A PTC-resistor for winding temperature monitoring in conjunction with a triggering device is regarded as equivalent protective equipment. Motors up to 200 kW can be fitted with such as the only form of protection. Using temperature monitoring as the only form of protection is stipulated for all operating modes which deviate from S1 operation, such as operation with frequency converter, switching operation, short-tem operation, heavy starting etc. Protection is also provided in case of reduced cooling air flow and/or too high ambient temperature. The pressure-tight HEW motors are fitted with PTC-resistor as standard. The motors can be equipped with other optional temperature sensors, e.g. early warning. Cooling (ventilation) All motors are fitted with a robust and temperature-resistant plastic or aluminium fan. External ventilation (IC 416): External fans are used, for instance, to increase the nominal output, for high switching frequencies and, if necessary, when operating with a frequency converter. All external fans are supplied with a three-phase connection. Stationary motor heating Anti-condensation heater The motors are fitted with an anti-condensation heater to prevent heavy condensation on the stator winding in case of major temperature fluctuations and load changes, e.g. when periodically at a standstill. Anti-freezing heater A stationary motor heater is a stipulated requirement for ambient temperatures < -20°C. The stationary motor heater must not be switched on whilst the motor is in operation. Anti-condensation heater Anti-freezing heater Motor Heating power Supply Motor Heating power Supply construction size voltage* construction size voltage* [W] [V] [W] [V] 63 12,5 230 ± 10% 63 12,5 230 ± 10% 71 12,5 230 ± 10% 71 12,5 230 ± 10% 80 25 230 ± 10% 80 25 230 ± 10% 90 25 230 ± 10% 90 25 230 ± 10% 100 25 230 ± 10% 100 50 230 ± 10% 112 50 230 ± 10% 112 50 230 ± 10% 132 50 230 ± 10% 132 50 230 ± 10% 160 50 230 ± 10% 160 75 230 ± 10% 180 75 230 ± 10% 180 150 230 ± 10% 200 75 230 ± 10% 200 200 230 ± 10% 225 100 230 ± 10% 225 200 230 ± 10% 250 150 230 ± 10% 250 300 230 ± 10% 280 200 230 ± 10% 280 300 230 ± 10% 315 250 230 ± 10% 315 400 230 ± 10% *Special voltages on request HEW DEx series
Three-phase A.C. motors Customized Motors Motors with brake The motors can be fitted with an optional separate mechanical brake. The brakes are equipped with their own terminal box. The winding of the motor is not subject to thermal strain by the braking procedure. The braking motors are used for lifting and travelling drives, tool machines, packaging machines, conveying technology, servo drives etc. Allocation of motor construction size / braking torque (reduced braking torque on request) Braking torque [Nm] 8 22 40 60 150 180 335 460 500 63 71 80 90 100 112 132 160 180 200 225 Voltages: The brakes are available with connection voltages 400V ~, 230V~ and 24V. Other special voltages are available on request. Version: The brakes comply with ignition protection type II 2GD EEx d IIC T5 and thus approved for use in zone 1 and zone 2, and zone 21 and zone 22. The brakes can be used as standard for a temperature range of –20°C to +55°C. (special version for –50°C to +55°C available). The brakes are fitted with a thermal switch for temperature monitoring. Special versions: - Brakes with manual release The brake can be supplied with optional manual release. Pulling the manual release lever when disconnected from the power releases the brake mechanically and the shaft cannot rotate - Brakes with stationary motor heater - Temperature monitoring with PTC-resistor instead of thermal switch - Brake motors with second shaft end - Brake motors with additional balancing weight The additional balancing weight is used for starting up and braking without jerking and is installed under the ventilation hood. - Braking motors with external fan and/or hollow shaft encoder Motors with an encoder Motors can be equipped with an optional hollow shaft encoder with the following technical data: Standard version Special version Manufacturer: Kübler Kübler Connection: 3 m cable without plug Other cable lengths with/without plug Pulses/revolution: 1024 10 – 5000 Output signal lever: TTL or HTL On request Supply voltage: 5V or 10-30V - Ignition protection type: II 2G EEx d IIC T6 - Dimensioned drawings: See page 6.1 (braking motors) and 6.3 (motors with encoder) HEW DEx series 1/23 1
Page 1 and 2: 117 1892-2009 E-Motions by HEW ! Ex
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Page 36 and 37: No. of poles: 4 Nominal data at 400
Page 38 and 39: No. of poles: 8 Nominal data at 400
Page 40 and 41: No. of poles: 4-2 Nominal data at 4
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Page 53 and 54: Dimension sheets
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Page 59 and 60: Three-phase A.C. motors Types DEx 6
Page 61: Three-phase A.C. motors HA HD I K L
Page 65: Dimension sheets Customized motors
Page 69: Three-phase A.C. motors Types DEx 6
Page 72: Types DEx 63 - 315 Special version:

Explosion-protected electric motors - Hew-hf.de

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