Dold 3 Phase Brake Module, 4 kW, 400 V ac

Motor brake unit, AR9021

Thyristor brake unit up to 4 kW
Compact design
Braking contactor built in
Braking current adjustable, max. 16 A
Adjustable braking time, max. 20 s
Increase safety
Reduce damage, work reliably
Wear-free and maintenance-free, for gentle or hard braking
Easy installation even as retrofit
Easy to use

The AR 9021 motor brake unit is used for DC braking of three-phase induction motors up to 4 kW at 400 V. The braking current I_B and the braking time t_B for the motor brake unit can be adjusted.
When braking, the following functions run consecutively: when the motor contactor is switched off, the internal braking contactor is switched on, after a fixed safety period, for the duration of the adjustable braking time and the braking current flows through the stator winding.
The operational voltage is connected to terminals L1-L2 and the locking contact for the motor contactor closes.
A red LED indicates that the supply voltage is connected. The motor can be started via the ON button.
The DC braking voltage for the stator winding is tapped from terminals T1 and T2 (device compliant with VDE 0106 part 100 and VBG 4).

Warning

If a load is to be held even during standstill periods of a motor, a mechanical holding brake must be provided.

DC Brake Modules

A powerbrake unit is used where fast, efficient and predictable stopping of a machine in the shortest possible time is required. Using the d.c. injection method, it provides a controlled deceleration to a stop, by injecting a d.c. current into two of the motor terminals and neutralising the rotating magnetic field in the motor after the 3 phase supply has been disconnected. This stops the motor coasting to a halt and reduces the delay time by this enforced braking. They can be used with a standard 3 phase induction motor. The unit may be located on a piece of machinery or adjacent to it, with little disruption or modification required to the existing wiring. The Powerbrake units provide a simple cost-effective solution to motor braking, which is maintenance and wear-free.,Brake Module - For a brake unit, all the control wiring has to be supplied and installed by the customer, including interlocked contactors and pushbuttons.,Production Brakes - Enclosed brakes with all control wiring included, optional DOL starter built in Injects DC on EVERY stop.,Critical Brake - Enclosed brake with contactors built in. Must be used with existing starter, also AC must pass through the unit so that it can be isolated before DC is injected. Only injects DC when E-stop activated.