Cutler-Hammer MP-3000 User manual

Instructions for IQ DC Power Supply
I.L. 17286B
Effective 7/98
The IQ DC Power Supply is a dc to ac inverter module
intended for operation of ac powered devices from a dc
supply. The unit will operate the Cutler-Hammer
MP-3000, IQ 1000 II, URTD, IQ Data Plus, Assemblies
Electronic Monitor, or other ac-powered equipment
requiring no more than 30VA of power at any power
factor.
NOTE: It may not be suitable for energizing devices
requiring inrush currents over 1 A (e.g., some contactors
and relays).
FEATURES

Handles input voltages ranging from 40Vdc to 250Vdc
with no need to set switches or jumpers.

The ac output is isolated from the incoming power.

Two LEDs provide operating and troubleshooting
indications.

Withstands output short circuits, while providing
ample power to start loads with inrush up to 1 A.
SPECIFICATIONS
Rated Supply Voltage: 40Vdc to 250 Vdc. Operates from
38 Vdc to 275 Vdc.
Output: Square wave, 60Hz, 125Vac

2Vac at no load
Output voltage varies less than + 2% as a function of dc
supply voltage within rated range.
Output voltage varies less than + 5% per 100mA load
change.
Rated Power Output: 30VA, at any power factor.
Ambient Temperature Range: 0

C to +70

C at full load.
Maximum Lead Length: Input: 35 ft of #14 AWG.
Output: 100 ft of #14 AWG.
Protection Limits: Average output current is limited to 0.4
A. After an average current overload, unit cools itself for
approximately 2 minutes and restarts. Peak short-circuit
output current is limited to 1 A on a cycle-by-cycle basis.
INSTALLATION
This device is designed to be installed, operated, and
maintained by adequately trained workmen. These
instructions do not cover all details, variations, or
combinations of the equipment, its storage, delivery,
installation, check-out, safe operation, or maintenance.
Care must be exercised to comply with local, state, and
national regulations, as well as safety practices, for this
class of equipment.
CAUTION
CAUTION: Remove all power from the device to
which the IQ DC Power Supply is being connected;
otherwise, serious or fatal personal injury and
equipment damage may result.
The IQ DC Power Supply should be fastened securely in
place before operating. Locate the module in an area
where air can freely move about the unit.
While mounting the unit absolutely NO power should be
connected. See Figure 1 for mounting holes.
1. With a recessed socket head wrench remove the four
bolts securing the front cover.
2. Remove the front cover.
3. Fasten the module to the intended structure with #8
screws

I.L. 17286B
Style No. PRELIM Effective 07/98
Printed in U.S.A.
Page 2
Cutler-Hammer
Five Parkway Center
Pittsburgh, PA 15220
FOR TECHNICAL ASSISTANCE CALL 1-800-809-2772
OR VISIT http:\\www.ch.cutler-hammer.com/pmp
4. Replace the front cover and the four bolts to secure
the front cover.
WIRING
See Figure 2 for electrical connections.
1. Note that the unit has no ON-OFF switch – identify
some external means of removing the dc supply.
2. Connect the ac load to the terminals labeled AC OUT.
Either terminal can be connected to ac common.
3. Connect the negative dc supply lead to the terminal
labeled DC GND. Note: This terminal is not
connected to safety or case ground – it can not
provide a dc circuit ground.
4. Connect the positive dc supply lead to the terminal
labeled DC IN.
Figure 1. Outline Dimensions
NOTE: If a single IQ DC Power Supply is being used to
power both an IQ 1000 II and a URTD or other load
together, contact Cutler-Hammer Technical Assistance
for specific wiring instructions.
Figure 2. Connection Diagram
RECOMMENDED CONNECTIONS
Use #14 AWG conductors, copper only.
Tighten terminals to 7 pound-inches.
OPERATION
Dc voltage may be applied to the IQ DC Power Supply by
any number of methods. It will start reliably with a 250
Vdc step input from a contactor or with a slow ramp from
a dc power source.
When dc power is applied, the unit will wait approximately
21 seconds with both LED’s on. After activating the ac
output the unit will blink the LED labeled D1 and may or
may not indicate an overload briefly when starting. The
various LED indications are listed below. Normal
conditions have D1 blinking and D2 dark; but D2 may
blink sporadically without indicating a problem.
AVERAGE-CURRENT OVERLOAD
D1 and D2

blinking alternately
PEAK CURRENT OVERLOAD OR OUTPUT SHORT
D1

blinking
D2

blinking ON or OFF sporadically, or ON
continuously.
To recover, remove or lighten load and wait two (2)
minutes for the start cycle to begin.