LTi Drives BR-026.03.540-UR Brake Resistor
Product Overview
The LTi Drives BR-026.03.540-UR is an industrial braking resistor identified by its complete model designation. The supplied product information lists a 750 V DC rating and a power value of 300 W. These specifications provide important identification details, but the complete electrical characteristics and permitted operating conditions must be confirmed from the actual product label and the applicable technical documentation.
Braking resistors are used with compatible drive systems to dissipate electrical energy generated during motor deceleration. When a motor slows down under controlled braking, it may return energy to the drive's DC link. In systems designed for resistive braking, a braking circuit directs this energy to a resistor, which converts the electrical energy into heat.
Electrical Characteristics
The stated 750 V DC value is an important consideration when assessing the resistor for a particular braking circuit. It must be interpreted according to the manufacturer's definition and must not be treated as proof that the component is compatible with every drive operating at a similar DC bus voltage.
The listed 300 W power value describes the supplied power classification. Actual thermal performance depends on braking duration, repetition rate, ambient temperature, mounting conditions and the drive's braking strategy. Peak pulse power and continuous power may differ significantly.
The supplied product information does not establish the resistor's resistance value. Verify the exact ohmic value from the nameplate or technical documentation before connecting it to a drive. Resistance is a critical parameter because it affects braking current and the operation of the drive's braking circuit.
Industrial Applications
Compatible braking resistors may be used in industrial machinery that requires controlled deceleration or repeated speed changes. Application categories can include automated production equipment, handling machinery and motion control systems. The BR-026.03.540-UR should be selected only when its verified resistance, power capability and voltage rating meet the requirements of the connected drive.
Installation and Thermal Safety
Braking resistors dissipate energy as heat and can reach high surface temperatures. Install the component using the specified mounting arrangement and required clearances. Maintain suitable ventilation and keep combustible materials away from hot surfaces. Any required thermal monitoring or protective device must be installed according to the manufacturer's instructions.
Before installation or maintenance, isolate the drive and follow the prescribed procedure for discharging stored energy in the DC link. Disconnecting the main supply does not necessarily remove all electrical hazards immediately. Installation and service work must be performed by qualified personnel.
Commissioning and Maintenance
Before enabling the braking function, confirm the resistor's measured or documented resistance, voltage rating and power characteristics. Verify that the drive supports the selected resistor and that the braking parameters match the electrical design. Incorrect resistance or unsuitable power capability can cause drive faults, inadequate braking or overheating.
Inspect the housing, terminals, cables and mounting hardware for signs of damage or excessive temperature. Investigate repeated thermal trips or unusual discoloration before returning the equipment to operation.
Product Selection
When replacing a braking resistor, record the full BR-026.03.540-UR designation and verify all relevant specifications. Do not select a substitute based only on its 750 V DC and 300 W markings, because resistance and pulse capability are also essential.
The LTi Drives BR-026.03.540-UR braking resistor is a drive system component that must be matched to the electrical and thermal requirements of the installation. Accurate specification and safe installation help support reliable braking performance in industrial applications.
