Thermal Overload Relay - Bimetallic Triple Pole, 16 Amps To 300 Amps | Adjustable Current, Temperature Compensation, Manual Reset Type

We manufacture and supply a wide range of thermal overload relays,
which is a bimetallic device made up of two strips of different metals.
The dissimilar metals in these thermal overload relays are permanently
joined. Heating the bimetallic strip causes it to bend, as the
dissimilar metals expand and contract at different rates. The thermal
bimetallic overload relay strips applies tension to a spring on a
contact. If heat begins to rise, the strip bends and the spring pulls
the contacts apart, breaking the circuit.

Important performance
characteristics to be considered while searching for thermal bimetallic
overload relays include full current load range, trip class, and
temperature trip range. The adjustable current value allows the thermal
overload relays to be set to the full-load current shown on the motor
rating plate. This is the current range of the thermal component that
can be adjusted to the desired trip point.

 

The trip
class is the maximum time in seconds at which the thermal overload
relays will trip when the carrying current is at 600% of its current
rating. Other important specifications to consider when searching for
thermal overload relays include motor load phase, motor voltage, control
circuit voltage, contact or output ratings, pole specifications,
features, and environmental operating parameters. The motor load phase
can be single-phase protection or three-phase protection.


Salient Features of SKYU Thermal Overload Relays:

 

• The triple pole bimetallic thermal overload relay is of the hand-reset type. It unmistakably indicates overload.
• A temperature compensation device prevents the relay from being affected by variation in ambient temperature.
• The
  entire relay unit is housed in highly voltage tasted Bakelite enclosure
  and is accurately calibrated and individually tested on an automatic
  test bench.
• Setting can be adjusted by means of a pointer.
• Satisfactory
  operation at all ambient temperatures from -5 deg.C to 55 Deg. C. SL1,
  SL2, SL3, SL-4, SL-6, SL-10, SL-12 relays are manual reset type.
• These relays are provided with auxiliary contacts having various thermal capacity
• These relays are suitable for direct mounting on Type SL contactors. 16 Amps to 300 Amps.