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Whirlwind PL-PM1/PL-PM1RJ Power Meter Technical Information.

Intended Use:

The Whirlwind PL-PM1/PL-PM1RJ Power Meter is intended to monitor 3 phase Y power with three 120 Volt AC legs or

single phase with two 120 Volt AC legs. It is intended to monitor the line side voltage and load current of both portable

AC distribution and permanent power distribution systems.

whirlwind PL-PM1 & PL-PM1RJ Power Meter

Display Mode Description:

ŸApply Power.

ŸThe power on sequence will illuminate all

LEDs on the front panel.

ŸThe Software Revision is then displayed in

the lower right hand display.

ŸMode A Voltage (blue LED) and current

measurements will display.

Mode A Voltage Display (blue LED

reference)

The TOP row of displays will show (left to right):

ŸX Leg to Neutral voltage

ŸY Leg to Neutral voltage

ŸZ Leg to Neutral voltage

ŸSafety Ground to Neutral voltage

Mode B Voltage Display (red LED reference)

The TOP row of displays will show (left to right):

ŸX-Leg to Y-Leg voltage

ŸY-leg to Z-Leg voltage

ŸZ-Leg to X-Leg voltage

ŸFrequency

Amperage Display (mode A and B)

The bottom row of displays will always show:

ŸX-Leg current

ŸY-Leg current

ŸZ-Leg current

ŸNeutral Leg current

Theory of operation: Voltage Measurement:

The first 3 of 4 Voltage displays are the primary voltage

measurements. Normal use is expected to be 3 phase

“Y” with three 120 Volt AC Legs or single phase with two

hot Legs. It also measures Leg to Leg voltages of 208

Volts AC. Maximum voltage Leg to Neutral or Leg to Leg

is 415 Volts AC.

The PL-PM1 also measures Neutral to Ground voltages

th

(4 display, normal mode). The range on the Neutral to

Ground is 0 to 99 Volts AC.

Accuracy is better than 2%, typically 1%.

The Voltage Input connector is a Wago 5 pin model with

the center pin (safety ground) designed to mate first, due

to a longer pin.

The connections are (Left to Right looking at the rear of

the chassis)

1. X- Leg

2. Y-Leg

3. Safety Ground (extended pin)

4. Z- Leg

5. Neutral

Current Measurement:

Current measurement utilizes 4 Current Transformers

part # TRCT600:1. The PL-PM1 presents a 1.5 Ohm

resistive load to the current transformer. It has a 600 to 1

current ratio. At 400 Amps AC in, the coil delivers 0.66

Amps AC. The maximum current the PL-PM1 measures

is 400 Amps AC.

Accuracy is better than 2%, typically 1%.

The Current Input connector is an 8 pin Wago to the PL-

PM1 from the current transformers.

The connections are:

1,2: X-Leg current loop

3,4: Y Leg current loop

5,6: Z-Leg current loop

7,8: Neutral Leg current Loop

Polarity of the current loop inputs does not matter,

although it is recommended to connect the red and black

in a consistent fashion on all the coils.

Frequency Measurement:

The PL-PM1 measures the frequency of the AC line

voltage from 47 Hz to 63 Hz with an accuracy of 0.1 Hz.

For technical assistance:

whirlwind

99 Ling Road - Rochester, New York 14612

800-733-9473 / 585-663-8820 Fax: 585-865-8930

whirlwindusa.com Made in U.S.A.

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