REOHM series 154

Max. continous power: 200 W

Unique Selling Point

Small dimensions
Fast connection
Short-circuit proof
Matching to any frequency converter
Less additional mounting area
Compact shape
High-resistance at overload
Vertical and horizontal installation

Description

The braking resistor REOHM 154 protects the machine from a voltage rise in the intermediate circuit, if an electric machine operates as a generator (Electromotive brake). The current reduces also the speed of the machine.

The serie REOHM 154 is available as braking resistor (series BW) or as charging resistor (series R).

As 154 R (Charging resistor, damping resistor, filter resistance, etc.)

The charging resistor is a current limiting resistor for the charging and discharging of capacitors and limitates for example the current flowing into the intermediate circuit capacitor inrush current. For this the device must be designed for a high single pulse energy and nominal voltage. The inductance of the resistor contributes to limit the inrush current, so wirewound resistors are the right choice.

Typical Applications:

Drive Technology
Renewable energy
Electromobility

Maximum energy with minimum space

The compact design enables the use in all applications where
little space is available (for example in cabinet and frequency converter)
Unity-Version can be assem-bled as low-profile and upright
In case of failure of resistor, this will become highly resis-tive
Test voltage: 2,5 kV AC (at 900 V rated voltage)

Optional

With temperature switch
Cover for protection against high surface temperatures

Technical Data

Resistance values : 2,2 - 500 Ohm

Continuous power : 50 - 200 W

max. operating voltage : 900 V

Circuit example

REOHM series 154

Max. continous power: 200 W

Technical data

Type	Resistance value R [Ohm]	with 25°C and surface temperature of.../P [W]		max. Operation voltage U [ V ]
Type	Resistance value R [Ohm]	200K	250K	max. Operation voltage U [ V ]
154 / 50	10 - 100	50	60	900
154 / 100	3 - 500	100	150
154 / 150	2,2 -160	120	160
154 / 200	5 - 200	140	180
154 / 250	5 - 250	160	200

Higher power ratings on request

Note

The ratings apply for 100 % duty cycle and free access and exit of cooling air.

In general: Is the ambient temperature higher than 40 °C, the continuous power must be reduced by 5 % per 10 K temperature rise.

REOHM series 154

Max. continous power: 200 W

Dimension drawings

Horizontal version		Upright mounting

Dimensions

Type	B1 [mm]	H1 [mm]	L1 [mm]	L2 [mm]	L3 [mm]	L4 [mm]	D [mm]	Connection wire
154 / 50	40	21	150	135	120	250	5,5	2 x AWG 14,UL 1659
154 / 100	40	21	170	155	140	250	5,5	2 x AWG 14,UL 1659
154 / 150	40	21	210	195	180	250	5,5	2 x AWG 14,UL 1659
154 / 200	40	21	250	235	220	250	5,5	2 x AWG 14,UL 1659
154 / 250	40	21	290	275	260	250	5,5	2 x AWG 14,UL 1659

Other fixing dimensions possible

REOHM series 154

Max. continous power: 200 W

Surface temperature in function of power

Surface temperature REOhm 154 / 100		Surface temperature REOhm 154 / 150

Surface temperature REOhm 154 / 200		Surface temperature REOhm 154 / 250

Surface temperature increase, even over temperature, describes the increase in surface temperature when loaded.

REOHM series 154

Max. continous power: 200 W

Load diagram

The power ratings apply for continuous duty. The power ratings can be increased in short-time operation in function of duty cycle by multiplication with the relevant factor from the diagram below or according to the formula as follows.