Delta Electronics VFD-EL manual Definition for Brake Usage ED%

Appendix B Accessories

Voltage

Applicable

Motor

hp kW

Models

					Min.
Full Load	Equivalent	Brake Unit	Brake	Brake	Equivalent
					Resistor
	Resistor	Model BUE	Resistors
Torque				Torque	Value for
	Value		Model and No.
KG-M		No. of Units		10%ED	each AC
	(suggestion)
		Used	of Units Used		Motor
					Drive

	0.5	0.4	VFD004EL43A	0.216	300W 400Ω		BUE-	1	BR300W400	1	400	400Ω
						40015
	1	0.75	VFD007EL43A	0.427	300W 400Ω		BUE-	1	BR300W400	1	200	200Ω
						40015
Series
	2	1.5	VFD015EL43A	0.849	400W 300Ω		BUE-	1	BR200W150	2	140	160Ω
460V						40015
	3	2.2	VFD022EL43A	1.262	600W 200Ω		BUE-	1	BR300W400	2	150	100Ω
						40037
	5	3.7	VFD037EL43A	2.080	900W 120Ω		BUE-	1	-		150	100Ω
						40037

NOTE

1.Please select the brake unit and/or brake resistor according to the table. “-“ means no Delta product. Please use the brake unit according to the Equivalent Resistor Value.

2.If damage to the drive or other equipment is due to the fact that the brake resistors and the brake modules in use are not provided by Delta, the warranty will be void.

3.Take into consideration the safety of the environment when installing the brake resistors.

4.If the minimum resistance value is to be utilized, consult local dealers for the calculation of the power in Watt.

5.Please select thermal relay trip contact to prevent resistor over load. Use the contact to switch power off to the AC motor drive!

6.When using more than 2 brake units, equivalent resistor value of parallel brake unit can’t be less than the value in the column “Minimum Equivalent Resistor Value for Each AC Drive” (the right-most column in the table).

7.Please read the wiring information in the user manual of the brake unit thoroughly prior to installation and operation.

8.Definition for Brake Usage ED%

Explanation: The definition of the barke usage ED(%) is for assurance of enough time for the brake unit and brake resistor to dissipate away heat generated by braking. When the brake resistor heats up, the resistance would increase with temperature, and brake torque would decrease accordingly. Suggested cycle time is one minute

B-2 Revision August 2008, 2ELE, V1.02