Lrd Lrd07 Lrd08 Lrd10 Lrd12 Lrd14 Lrd16 Lrd21 Lrd22 Lrd32 Lrd35 Lrd3357 Lrd3359 Lrd3361 Lrd3363 Lrd3365 Lrd4367 Lrd4369 Thermal Overload Relay
LRD thermal Overload Relay
Applications
This series of thermal relay can be used in the circuit of 50Hz or 60Hz, rated insulation volt
age 660V, rated current 0.1-96A for protecting the phase break when the electric motor is
overload.
The relay has different mechanism and temperature compensation & can be pluged in KLC1-
D series AC contactor. It is the most advanced thermal relay in the nineties in the world.
characteristics
a. Fundamental parameter of the main circuit
(a). Rated insulation voltage 660V.
(b). Rated working current 25,36,93A separately.
(c). The regulator seal of rated setting current and setting.
(d). Current of the Thermal component (see list 1)
b. Auxiliary Circuit
(a). There is one pair of NO/ and N/C contact with electric insulation.
(b). Rated insulation Voltage 500V.
(c). Rated frequency 50-60Hz.
(d). Use group, rated working voltage, appoint thermal current and rated current.
Motion Characteristic: Three-phase Balance Motion Time
| No |
Times of the setting current |
Motion time |
Start condition |
Ambient temperature |
| 1 |
1.05 |
>2h |
Cold state |
20±5oC |
| 2 |
1.2 |
<2h |
Heat state(Following the No.1 test) |
| 3 |
1.5 |
<4min |
| 4 |
7.2 |
10A |
2s< Tp≤10s |
≤63A |
Cold state |
| 10 |
4s< Tp≤10s |
>63A |
Phase-losing Motion Characteristic
| No |
Times of the setting current |
Motion time |
Start condition |
Ambienttemperature |
| Any two phases |
Another phase |
| 1 |
1.0 |
0.9 |
>2h |
Cold state |
20±5oC |
| 2 |
1.15 |
0 |
<2h |
Heat state(Following the No.1 test) |
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