Duct connection

Fans are not included in the scope of supply of motors designed for use with a fan unit 1GH. The ducts should be dimensioned to ensure that the motor is provided with a cooling air flowV· and pressure p as specified in the above table.

Fan unit

In the case of fan unit assemblies for 1GG, 1HS and 1HQ motors, three-phase induction motors with supply voltages of 50 Hz 380 V to 420 V AC are used (according to EN 60 034 ± 5%). Motors of Size 160 are provided with fan motors with a widerange winding of 50/60 Hz 380 to 500 V AC. For other supply voltages and frequencies, a three-phase induction motor with a non-standard winding is required (short code Y81). Fan unit motors for cooling air temperatures of 55 °C or higher or at site altitudes above 3000 m are available on request.

Filter installation

A dry-type air filter can be mounted and even retrofitted on all 1GG motors without any derating.

Air-to-water heat exchangers for 1HS5, 1HS6 and 1HS7 motors

For 1HS5, 1HS6 and 1HS7 motors, the heated internal air is cooled down by the air-to-water heat exchangers installed in the heat exchanger assembly. The internal air is circulated by sepa- rately-driven fans.

For a cooling water inlet temperature of 25 °C, 1HS motors have the same output data as 1GH motors; output data can be supplied on request for other temperatures.

The water connections are mounted as standard on the righthand side (viewed from the drive end).

It is only possible with coolers in special version to subsequently change over the cooler for water connection to the left.

If a water analysis is not provided when ordering the motors, a standard cooler is supplied.

The cooling water temperature rise is, for the standard version, up to 10 K and the maximum water pressure is up to 6 bar (test overpressure 9 bar).

•Standard version

Cooler with copper ducts and copper collectors (not removable) for water that has been cleared of solid particles and that does not contain aggressive substances.

•Special version

Cooler with CuNi10Fe ducts, removable plastic coated steel chambers, suitable for brackish water. Cooling ducts can be cleaned mechanically.

Thermal motor protection

The motors can be fitted with temperature sensors if required. The temperature sensors are installed in the coil end of the commutating pole winding on the air outlet side or, in the case of compensated motors, in the compensation winding. Reliable motor protection can be achieved thanks to current limiting and I2t monitoring of the associated SIMOREG DC MASTER. Temperature sensors are connected on auxiliary terminals in the motor terminal box.

Continuous temperature monitoring can be implemented by selecting a KTY84-130 silicon sensor (short code A23) or a PT100 resistance thermometer (short code A62). For limit value monitoring (2 components are installed if both "Warning" and "Shutdown" are required), PTC thermistors are available (PTC resistors, short codes A11 and A12) and bi-metal strip temperature monitors (short code A31).

Bearing temperature monitoring

The bearing temperature can be monitored for motors from Size 180 by means of PT100 resistance thermometers

(short code A76). They are connected on the auxiliary terminals in the motor terminal box.

Air flow monitor

For motors with an externally mounted fan unit, the internal air can be monitored using an air flow monitor (short code A97). The air flow monitor cannot be used for monitoring the air filter.

Brush monitoring

The brush length can be monitored (limit value) using a microswitch mounted on the brush holder (short code A06). The output signal is floating and can be evaluated by the SIMOREG DC MASTER.

2For motors of Sizes 500 and 630, non-floating evaluation only is possible by means of signaling brushes (short code A00). For evaluation, the KM01 signaling unit can be ordered from Schunk Kohlenstofftechnik GmbH, Wettenberg, Germany.

Cooling air thermometer

In the internal air circuit of the air-to-air and air-to-water cooled motors, a PT100 cooling air thermometer can be installed for detecting the temperature of the heated air (short code A45). The PT100 is connected on an auxiliary terminal block mounted in the cooler assembly.

Leak warning device

Motors with an air-to-water heat exchanger assembly can be equipped with a warning electrode for monitoring water leakage (short code H08). The warning electrode is connected in the electrode casing.

Anti-condensation heating

For motors that are subjected to a risk of frequent condensation of the winding due to climatic conditions, e.g. motors that are at a standstill in humid ambient air or motors that are subjected to large temperature variations, anti-condensation heating can be provided (short code K45 for 230 V). This heats the air in the motor and condensation does not form inside the motor. Anti-con- densation heating must not be switched on during operation.

They are connected on the auxiliary terminals in the motor terminal box.

The motor can also be heated, however, through the excitation winding. For this purpose, a current of 30% to 40% of the rated excitation current is applied to the excitation terminals of the motor with the armature circuit open (without external cooling). In this case, approximately 10% to 15% of the rated excitation output is available as heat output.

Earth brushes

To avoid bearing damages caused by ripple voltages, an earth brush (order code A05) for motors from shaft height 180 can be provided.

Terminal box

All motors are equipped with a terminal box to the IP55 degree of protection which houses the power connections, excitation and terminals for connecting temperature sensors, anti-conden- sation heating, etc.

For the size of conductor cross-sections, see DIN VDE 0298.

Terminal box design

The terminal boxes of the motors are fitted with a removable cable entry plate. This is normally supplied undrilled.

The cable entry plate can be pre-drilled for a maximum number of heavy-gauge threaded joints to DIN 46320 (short code K55) or with metric threads to DIN 89280 (short code K57). The gland is enclosed.

Shaft end

The shaft ends comply with DIN 748-1, the centering holes (60°) comply with DIN 332 and the keyways are constructed according to DIN 6885 Page 1. The featherkeys are included in the scope of supply.

If required, the motors can also be supplied with a non-standard shaft end (please inquire).

A second shaft end can be provided for the motors. For output over an elastic coupling, the full rated torque can be transferred from the non-drive shaft end. With brake assembly, a second shaft end is not possible.

Balancing

The motors of the 1G.5/1H.5 and 1G.6/1H.6 series are balanced with full-key. Balancing with half-key is possible (short code

L69).

Motors of the 1G.7/1H.7 series are balanced with half-key. Balancing with full-key is possible (short code L68).