Maintenance And Checks; Notices On Maintenance And Checks; Check Items - Hitachi BRD-E2-30K Operation Manual

10. MAINTENANCE AND CHECKS

10.1 Notices on Maintenance and Checks

l
Be sure to turn off the supply power. (Make sure that the DC voltage between
terminals P and N is 45 volts or less.) Otherwise, you may receive a serious electric
shock.
l
Only an authorized electrician is allowed to check, maintain, and replace parts of the
dynamic braking unit.
(Take off all metallic accessories such as watches and jewelry before operating.)
(Use the insulated tools.)
Otherwise, you may receive a serious electric shock or personal injury.
Notes:
(1) Always keep the inside and outside of the dynamic braking unit clean. Always
connect cables correctly. Missing and wrong connections are prohibited. Tighten
the terminals and connectors firmly.
(2) Keep this device away from wet, oily, or dusty locations. Metallic filings in the
product can easily cause short-circuits, damage the unit or start a fire.

10.2 Check Items

(1) Daily checks
(2) Periodic checks (every one year)
(3) Insulation resistance test and dielectric strength test
Connect the terminals as shown below and test under the following conditions:
• Insulation resistance test
Measure the resistance between the ground and the interconnected terminals with a
meggar and make sure it is 5 megohms or more.
• Do not perform the dielectric strength test.
When required, apply a voltage of 2000 VAC between the ground and the interconnected
terminals for one minute and check for problems.
• Do not use any other terminals for the dielectric strength test.
• Be sure to increase and decrease the test voltage slowly.
Meggar
Insulation resistance test and dielectric strength test
Title: (Danger.eps)
DANGER
Creator: Adobe Illustrator(TM) 7.0
CreationDate: (1/26/0) (5:10 PM)
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