LR9 Thermal Overload Relay

Wholesale LR9 thermal overload relay manufacturer, 32A/690V, thermal setting range 6.4-32A, selectable tripping class 5-10-20-30, for protection of 3-phase motors 3-15KW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, buttons for test, stop and reset as well as manual-automatic reset selector, dipswitches for tripping class selection, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling. With a large thermal setting range 6.4-32A, a selectable tripping class 5-10-20-30 and phase unbalance detection, it protects motors 3 to 11KW@400V. Connection by screw clamp terminals, it connects directly to the bottom terminals of 3-pole contactors LC1D09-D38. Mounting on DIN rail or screw fixing, separated from contactor, with use of the terminal block LAD7B205 (to be ordered separately). Multi-standards certified (IEC, UL, CSA, CCC), Green Premium compliant (RoHs/Reach).

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Product Description

LR9 thermal overload relays are especially suited to the operating conditions of motors.

They provide protection against:

thermal overload of 3-phase or single-phase balanced or unbalanced circuits; phase failure and large phase unbalance, protracted starting times, prolonged stalled rotor condition.

LR9 electronic protection relays are mounted directly below LC1 F type contactor. They cover a range from 30 to 630 A, in eight ratings.

The settings can be locked by sealing the transparent protective cover. Areset button is mounted on the front of the relay.

Two versions are available:

simplified version: class 10: LR9*3**, class 20: LR9 *5**,

complete version: class 10, 10 A or class 20, selectable, conforming to

EN 60947-4-1: LR9**.

This latter version includes an alarm function which makes it possible to forestall tripping by load shedding.

Simplified version: class 10 or 20

Rated or scale of rated current(A)	aM(A)	gG(A)	Model of contactor	Model
10 class
30~50	50	80	F115- F185	LR9-5357
48~80	80	125	F115- F185	LR9-5363
60~100	100	200	F115- F185	LR9-5367
90~150	160	250	F115- F185	LR9-5369
132~220	250	315	F185- F400	LR9-5371
200~330	400	500	F225- F505	LR9-7375
300~500	500	800	F225- F500	LR9-7379
380~630	630	800	F400- F630 F800	LR9-7381
20 class
30~50	50	80	F115- F185	LR9-5557
48~80	80	125	F115- F185	LR9-5563
60~100	100	200	F115- F185	LR9-5567
90~150	160	250	F115- F185	LR9-5569
132~220	250	315	F185- F400	LR9-5571
200~330	400	500	F225- F500	LR9-7575
300~500	500	800	F225- F500	LR9-7579
380~630	630	800	F400-F630 F800	LR9-7581