The relationship with Cressall is now well established and compliments CP Automation’s range of independent supply relationships with manufacturers of inverters, PLCs and other electronic equipment and control systems.
The HP series of high performance dynamic braking resistors (DBRs) is “ideal for use on cranes, winches, conveyors and test loads,” CP said.
The ready-boxed DBRs are enclosed to IP20 and make “virtually no noise when subject to inverter braking currents.”
The range is divided into HP1, HP2 and HP3 units, which have continuous power ratings of 1.5kW, 3.0kW and 4.5kW respectively.
Also available is the range of low noise ES braking resistors, which has recently been expanded with the addition of 1.0 and 2.0kW sized models. These new ratings complement the existing array, which includes 0.6, 1.5, 3.0 and 4.5kW units.
The new 1.0 and 2.0kW sizes are used where there is the need to cope with high levels of regenerated energy in a compact space.
Both sets of resistors are manufactured using high grade nickel chrome wire, which means the resistance value changes only negligibly over the temperature range of the element. “This is a significant factor,” said CP Automation director Tony Young, “because a design using lower grade stainless steel could increase in resistance by as much as 50% – resulting in impaired braking.”
