Time Mark 422 Data Sheet

C

L

3.88"

3.0"

0.44"

3.03"
Holes are symetrical

about center line.

0.203" 4 PL.

5.5"

6.06"

0.55"

2.63"

0.28"

MOTOR

4-20mA

OUTPUT

REVERSE WIRES TO CT
IF MOTOR FAILS TO RUN
FOR MORE THAN THE INITIAL
2 SECOND PERIOD.

MODEL 276A-xx

L1

L2

MANUAL

RESTART

120VAC
COIL

TIME MARK is a division of

MODEL 422

Submersible

Pump Controller

 Monitors True Motor Power
(volts x current x power factor)

 Detects Motor Overload or Underload

 Operates on 120 or 240VAC,

Single-phase or 3-phase

 Built-in Trip and Restart Delay Options

SPECIFICATIONS

DESCRIPTION

The Model 422 Submersible Pump Controller detects
an overload or underload condition on all types of
running pump motors: suction pumps, submersible
pumps, etc.

This Monitor detects the actual power used (voltage x
current x power factor) and is more sensitive than
simple current monitors. The 422 can be used with
single phase pumps or, using the Model 276C current
transducer, with 3-phase pumps. Matching CT’s allow
the Model 422 to be used with most pump motor sizes.

Optional trip and restart delays are provided.

TYPICAL APPLICATION -single-phase monitoring

Model 422

Input Voltage Range 100-130VAC or 200-250VAC

Frequency 50/60Hz

Power Consumption

Nominal Current

Minimum Current

Current Adjustment 0 - 5 amps x PF

Current Output 4-20mA for chart recorders

Repeat Accuracy 1% (fixed conditions)

Output SPDT 10A at 240VAC resistive

Expected Relay Life Mech: 10 million operations

Trip Delay

Restart Delay

Indicators Red LED: Overload or Underload; tripped

Transient Protection 2500V for 10ms

Operating Temp - 20º to 131º F

Humidity Tolerance 97% w/o condensation

Enclosure Material ABS plastic

Weight 1 lb.

Agency Approvals UL Listed to US and Canadian safety

0.5 VA max.

2.5 amps

0.25 amps

Elec: 100,000 operations at rated load

OFF or 0.3 to 180 seconds

OFF or 0.1 to 4 hours

Yellow LED: Restart timing

standards CSA Certified

DIMENSIONS

Page 1 of 8 11/2011

© 2011 TIME MARK CORPORATION

TIME MARK is a division of

MODEL 422

READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.

Submersible Pump Controller

KEEP THIS DATA SHEET FOR FUTURE REFERENCE.

APPLICATION GUIDE

GENERAL

This application guide is written for equipment designers,
maintenance personnel, electrical contractors, etc.

It is intended to aid in the installation of the Model 422
Submersible Pump Controller into pump protection systems.
The notes and diagrams deal with methods of protecting motors in
the event of an underload condition or an overload condition.

THEORY

The need for a system to detect an underload condition other than
by the simple monitoring of current becomes clear when
examining the following waveforms.

In a purely resistive circuit, as in Figure 1, the current (amps) is
directly proportional to the power (watts) being consumed. To find
the power, multiply the voltage across the load times the current
through the load. The result is in watts (V x A = W).

In Figure 2, When the load is not resistive, but inductive as it is
with a motor, the formula is no longer correct. The inaccuracy
occurs because the current and the voltage waveforms are not in
phase.

The current waveform lags the voltage waveform by as much as

90 degrees in a completely unloaded condition, or as little as 5 or
10 degrees in a fully loaded condition.

The current, as measured with an ammeter, may only vary a slight
amount as the motor changes from a fully loaded condition to a
completely unloaded condition. This makes it difficult to detect an
unloaded condition by simply monitoring current alone.

To obtain an accurate picture of real power consumption of any
inductive device, such as a motor, the formula V x A x Cosø = W
is used.

The Cosø is a multiplication factor derived from the number of
degrees of lag between the current and voltage waveforms.

This is called the “power factor” (or “PF”). The power factor is the
natural cosine of the degrees of lag:

Degrees

of lag

0 1.000 50 0.643

5 0.996 55 0.574

10 0.985 60 0.500

15 0.966 65 0.423

20 0.940 70 0.342

25 0.906 75 0.259

30 0.866 80 0.174

35 0.819 85 0.087

40 0.766 90 0.000

45 0.707

Power
Factor

Degrees

of lag

Power
Factor

Figure 1. RESISTIVE

LOAD

With a purely resistive load, the current and voltage
waveforms are occurring simultaneously.

Figure 2. INDUCTIVE

LOAD

With an inload, the current waveform lags
the voltage waveform by 60°.

Page 2 of 8 11/2011

© 2011 TIME MARK CORPORATION

TIME MARK is a division of

2.38"

1.95"

1.63"

Secondary

Space for Primary turn:

0.25" 0.38"x

1.25"

0.43"

.187" dia.

Secondary terminals

(0 - 5 amps)

Loop one leg of AC
line thru transformer
as shown

MODEL 422

Submersible Pump Controller

APPLICATION GUIDE

Example: TRUE POWER CONSUMED BY AN AC

MOTOR

For this example we will use a 3-horsepower, 230 volt,
single phase motor.

Condition 1 represents the motor being used at near full
load, while Condition 2 represents a drop in motor load.

Comparing the results of this example, the motor
current decreased only 10% with a drop of 61% in the
motor load (input power). A drop in pump motor power
cannot be accurately measured by only monitoring the
current and voltage.

By monitoring the phase relationship and applying the
resultant power factor an accurate and selective
method of sensing changes in true power consumption
can be obtained.

The Model 422 Controller is based on the above
principal of detecting the actual power used, and is
more sensitive than simple current monitors.

ADDITIONAL FEATURES

As described previously, the Model 422 would fulfill the
basic requirements in most pump motor protection
control systems. However, there are situations which
would require the pump to restart automatically after a
preset time.

The Model 422 has an adjustable restart timer for
such applications. This timer has a range of 0.1 to 4
hours. If the restart timer is not needed, turn it off with
DIP switch 2.

If restart timing is needed for an underload condition
only, the overload restart can be turned off with DIP
switch 1.

Resetting the Model 422 is accomplished by cycling the
power off and back on, pressing the RESET button, or
by using the restart timer (DIP switch 2).

Some applications require a trip delay period before
shutting down the pump. The Model 422 has a built-in
trip delay timer. The timing range is from 0.3 to 180
seconds. The trip delay timer can be turned off with
DIP switch 4.

Example: (V x A x Cosø = Watts)

Condition 1

230 volts x 10 amps x 0.985 PF = 2265.5 watts

Condition 2

230 volts x 9 amps x 0.423 PF = 875.6 watts

Refer to the chart under INSTALLATION (pg 4) for all
DIP switch settings.

A 4-20mA output is provided for monitoring power
consumption. A 4mA output is equal to 0 watts and a
20mA output is equal to 600 watts at 120 V or 1200
watts at 240 V.

This signal can be sent to a strip chart recorder, a
process controller, computer, etc.

INPUT CURRENT REQUIREMENTS

The CT input of the Model 422 is the isolated winding of
a small current transformer within the unit. Ideally, the
current range needed should be between 2 and 3.5
amps for a fully loaded motor.

Polarity of the wires connected to the CT terminals is
critical to achieve the correct phase relationship

between the current and voltage waveforms as
described earlier.

This is simple to determine after the installation is
complete (refer to the ADJUSTMENT PROCEDURE, pg

5).

If the full load motor current is 3.5 amps or less, and the
pump motor is a single-phase type, connect one leg of
the motor current directly into the Model 422.

Figure 3 shows the Model 276A and Figure 4 shows
the Model 276B Current Transformers; available from
Time Mark.

Figure 3. MODEL 276A CURRENT TRANSFORMER

Page 3 of 8 11/2011

© 2011 TIME MARK CORPORATION