emk KHF Series, KHF 100, KHF 80, KHF 112, KHF 90 Operating And Maintenance Manuallines

» Operating and maintenance

guidelines

EMK-motors

Table of contents

Operating and maintenance guidelines

EMK motors

Operating and maintenance guidelines EMK motors 3

Spare Parts 5

Lubrication periods 6

Measures 7

Operating and maintenance guidelines spring-operated brake 9

Operating and maintenance guidelines
EMK motors

» EMK motors distinguish themselves...

The electrical connection and maintenance of an elec-

tric drive may only be carried out by qualified electrical

personnel, who are conversant with the relevant regu-

lations. Similarly, the applicable accident prevention

regulations are to be adhered to.

Every EMZ motor is dispatched only after the specifi-

cations on the order have been checked, and a trial run

had been carried out. Until installed, the motor is to be

stored dry and in the same way as the mounting positi-

on. For longer stocked motors the insulated resistance

of every phase has to be measured to ground. It has to

be greater than 0,5 MΩ. For trouble free functioning,

proper installation and operation is essential.

Installation

The motor is to be installed according to its mounting

position and on an even and vibration-free base. The

shaft extensions up to 50 mm 0 have tolerances con-

forming to ISO k6 and above to ISO m6. Before fitting,

the rust inhibitor must be removed from the shaft end,

however, care must be exercised to ensure that no sol-

vent penetrates into the bearing. The motor shaft end

has been provided with a centre and a tapped hole, ac-

cording to the DIN specification 332 type D, which can

be used to pull on the transmission elements without

exerting harmful forces on the motor bearings.

Hammer blows and jolts are to be avoided at all times!

So as not to load the motor shaft excessively, the motor

and the driven machine are to be carefully aligned.

Important for installations in wet internal conditions

or outdoors.

Please note that trouble free operation can only be en-

sured if all the measures set out below are carried out.

The motor terminal box is to be fitted so that the cable

entries are directed downwards.

Use suitable conduit screw fittings for the cable being

used and if necessary use reducing nipples.

Conduit screw fittings and plugs are to be coated with

sealing compound, tightened up securely and recoated.

Cable intakes are also to be made completely water-

tight.

The sealing surfaces of terminal boxes and termi¬nal

box covers are to be properly cleaned before reassem-

bly.

Size

M12 x 1,5 1,5 8

M16 x 1,5 3,0 10

M20 x 1,5 6,0 12

M25 x 1,5 8,0 12

M32 x 1,5 10,0 18

M40 x 1,5 13,0 18

M50 x 1,5 15,0 20

M63 x 1,5 16,0 20

M72 x 1,5 - 28

M80 x 1,5 - 40

Plastic Metal

Torques (Nm)

Gaskets are to be glued down on one face. Brittle gas-

kets are to be replaced!

When reassembling after maintenance work, etc. the

end shield centring spigots are also to be coated with

sealing compound.

The corrosion protection consists of a number of paint

coatings. Depending on environmental conditions the

paint coating must be renewed on a regular basis or

wherever necessary.

EMK Operating and maintenance guidelines 3

The stated rated motor power applies for a maximum

40 °C ambient temperature and installation altitude up

to 1000 m (3330 feet) above sea level. For higher am-

bient temperatures or installation at greater heights

the power rating is reduced accordingly. (Refer to DIN

57530).

The unimpeded access of ventilating cooling air must

be ensured.

Condensate water drain holes (only on customer‘s re-

quest) are plugged with plastic plugs that can be ope-

ned as required. Open condensate water drain holes are

not permitted because then the IP44 resp. IP55 is lost!

Electrical connection

The motor is connected in accordance with the data

shown on the nameplate and per the accompanying

circuit diagram. Ensure that the terminal links are cor-

rectly placed and all connections, including the protec-

tive earth conductor, are screwed tightly.

To protect the motor from being overloaded, appropri-

ate protective devices must be provided. Fuses do not

give this protection. For motors with high starting fre-

quencies the conventional motor protection is insuffici-

ent; and it is advisable to purchase these motors with

thermistors imbedded in the windings and to monitor

them with an external tripping relay. In this manner the

motors are fully protected against practical all possible

overloads.

Maintenance

For motors up to and including size 132 it is sufficient

to keep the cooling passages cleaned and to check the

bearings. These motors have bearings with service life

lubrication. If the motor is being overhauled the bea-

rings are to be replaced. Motors larger than size 160 are

provided with a lubricator. In addition to keeping the

regularly and relubricated with a grease pump accor-

ding to the schedule below.

Relevant for greasing interval and grease quantity are

the grease labels fitted on the motor.

Please pay attention that the regreasing device may

not be filled for the first greasing interval.

For this, the double grease quantity has to be used.

As soon as the maximum number of relubrications is

exceeded, the old grease must be removed from the

grease chambers and bearings, after which these must

be cleaned thoroughly. Next the inner chambers and

the bearings must be provided with new grease. The

outer chambers may not be filled with grease.

The type of grease to be used for lubricating the be-

arings can be found on the relubrication plate of the

motor.

WARNING:

When motor is exploited in extremely conditions, i.e.:

» dustiness > 800mg/m3

» relative humidity > 80%

» aggressive in air

it is necessary to decrease minimum two times period

between consecutive inspections.

Drain-hole

EMK-motors are equipped with a drain-hole (originally

closed) which has to be opened during service regularly.

cooling passages clean the bearing should be checked

4 Technical amendments reserved, errors excepted