Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor

Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor

Thermal?overload?relays?are?protective?devices.?They?are?designed?to?cut?power?if?the?motor?draws?too?much

current?for?an?extended?period?of?time.?To?accomplish?this,?thermal?overload?relays?contain?a?normally?closed?

?(NC)?relay.?When?excessive?current?flows?through?the?motor?circuit,?the?relay?opens?due?to?increased?motor?

temperature,?relay?temperature,?or?sensed?overload?current,?depending?on?the?relay?type.?

These?overload?relays?are?similar?to?circuit?breakers?in?construction?and?use,?but?most?circuit?breakers?differ

?in?that?they?interrupt?the?circuit?if?overload?occurs?even?for?an?instant.??Thermal?overload?relays?are?conversely?

designed?to?measure?a?motor\'s?heating?profile;?therefore,?overload?must?occur?for?an?extended?period?before

?the?circuit?is?interrupted.

Applications:

UKH series overload relays apply to circuit of AC 50Hz or ?60Hz, rated voltage to below 660V and rated current . 1A-800A for AC motor overload and open-phase protection during long time or intermittent long time service, which can also protect 3-phase serious imbalance and long starting time of motor or long timer operation, can also be used for corresponding AC contactor for electromagnetic starter.

Specifications:

Three-phase Balance Motion Time

Features:

1. Direct mounting structure:

??The ?thermal overload rela can be?mounted?directly to the Magnetic Contactors without

? ?additonal brackets.??(Applied model: UKH-22, 40, 85,100,150,220,630)

2. Safety cover

???The finger proof safety cover prevent careless touch of electric conductor

3?.?Separation of power part and operation part

???The main circuit and the operation part are separately designed and the operation part is commonly used.

4?.?Easy operation

Working condition:

1. ?The installation altitude less than 2000m

2. ?The surrounding temperature range: from -5°C ~ +40°C

3. ?In the non-explosive condition. or without adequate erosion and destruction of gas and dust

? ? ?conductive area .

4. ?Without? rain and snow?invade?

5.??Pollution level 2