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Page 7-1
Effective 10/02 IL17562BH04
SECTION 7—STARTUP
7.0 General
This section lists the procedure for applying ac power to an MP-3000
for the first time. Use it as a checklist to reduce the chance of skipping
an item.
DANGER
ONLY QUALIFIED PERSONNEL FAMILIAR WITH THE MP-3000,
THE MOTOR STARTER, AND ITS ASSOCIATED MECHANICAL
EQUIPMENT, SHOULD PERFORM THESE STARTUP PROCE-
DURES. FAILURE TO COMPLY CAN RESULT IN SERIOUS OR
FATAL INJURY AND/OR EQUIPMENT DAMAGE.
CAUTION
DO NOT USE A MEGGER® OR OTHER HIGH-VOLTAGE INSULA-
TION TESTER ON CIRCUITS CONNECTED TO THE MP-3000
TERMINALS. FAILURE TO COMPLY COULD RESULT IN EQUIP-
MENT DAMAGE. IF WIRING INSULATION IS TO BE TESTED, DO
SO BEFORE CONNECTING THE RELAY, ITS OPTIONAL ACCES-
SORY MODULES, OR OTHER VULNERABLE DEVICES IN THE
MOTOR CONTROL SYSTEM.
7.1 Power-off Checks
With the incoming ac power isolation switch locked off, perform these
checks:
• Open the isolation switch feeding control power to the MP-3000.
• Check to be sure there is no possibility of backfeeding control
power through the control transformer, which will result in voltage
being present on the primary of the transformer.
• Make sure that any foreign sources of power, such as those
connected to the MP-3000 output relay terminals or discrete input
terminals, are off.
• Check the wiring for conformance to the wiring plan developed for
the application.
• Make sure that the ct secondary current rating and the MP-3000 ct
input rating style agree (either 5A or 1A).
7.2 Initial AC Power Checks
Refer to Figure 6.8, MP-3000 Rear Panel Terminals, as necessary.
Also, see URTD terminals in Figure 6.6, and URTD I.L. 17367.
• With the power still off, disconnect the ac control power lead to
terminal 4 (120 or 240 Vac power input to relay).
• Disconnect and insulate the contactor lead from the trip relay
terminal 12, to prevent contactor energization during most of this
testing.
• If the optional URTD is used, disconnect the 120 Vac power
connector J3 from the URTD module.
• Connect an ac voltmeter between the wire just disconnected from
terminal 4, and terminal 7 (neutral of power input to relay).
• Turn ac power on to the MP-3000, and to the separate remote
contact-wetting source if one is used. Usually, the contacts to be
read by the discrete inputs will be energized from terminal 6 of the
MP-3000 rather than a separate remote source.
• Verify that either 120 Vac or 240 Vac on the lead disconnected from
terminal 4. The MP-3000 automatically configures its power supply
to work with one or the other value. Nominal values other than 120
Vac or 240 Vac, including values in between 120 and 240, are not
recommended. However, the MP-3000 is well able to handle
depressions, dips, and limited sustained variations in the normal
course of service. See Specifications.
• If the optional URTD module is to be powered from terminals 4 and 7
of the MP-3000, the supply must be 120 Vac only. The URTD is
rated only for 120 Vac, and cannot operate from 240 Vac. If
necessary, use an auxiliary 240V/120V step-down transformer for
the URTD, able to handle 6VA burden.
• Turn off ac power. Troubleshoot wiring if necessary.
• Once ac supply voltage is correct, reconnect the lead disconnected
from terminal 4.
• Disconnect the discrete input leads, if used, to terminals 8 and 10.
• Connect voltmeters between the leads just disconnected from
terminals 8 and 10, and terminal 9, the discrete input common.
• Close or jumper the contacts which are read by the discrete inputs,
if used.
7.3 Initial Checking with AC Power to Relay
• Turn on ac power again. The MP-3000 is now energized.
• Check the voltage between MP-3000 terminals 6 and 7. It should be
approximately 120 Vac, regardless of 120V or 240 V supply.
• If discrete input 1 is used, verify that 120 Vac is present on the lead
disconnected from terminal 8, measured to terminal 9.
• If discrete input 2 is used, verify that 120 Vac is present on the lead
disconnected from terminal 10, measured to terminal 9.
• Place the relay in Program mode. Navigate to the SP TEST page.
• Page to P13L7, state of discrete input 1. It should report DI 1 OFF.
• Page to P13L8, state of discrete input 2. It should report DI 2 OFF.
• Check voltage across power terminals of URTD power connector
plug removed from J3. Confirm 120 Vac.
• Turn off ac power again. Troubleshoot discrete input and/or URTD
wiring if necessary.
• Reinstall power plug into J3 of URTD.
• Check URTD configuration DIP switches, to insure they are set for
the types of RTDs actually installed in the motor and load equip-
ment. See URTD I.L. 17367 for specifics.
• Reconnect the leads disconnected from terminals 8 and 10.
• Turn on ac power again.
• Recheck P13L7, state of discrete input 1, if used. It should report DI
1 ON.
• Recheck P13L8, state of discrete input 2, if used. It should report DI
2 ON.
• Turn off ac power again. Troubleshoot discrete input wiring.
• Remove jumpers on remote contacts or set to normal state.
• Use the MP-3000 discrete input test page indications to test the
actual operation of the contacts, if possible.
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