H421/SP

H421/SP
Installation Guide
Current Sensors
TM
TM
H421/H421SP
Split-Core Current Transducer,
High Current, 4-20mA Output
Product Overview
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
•
•
•
•
Follow safe electrical work practices. See NFPA 70E in the USA, or applicable local codes.
This equipment must only be installed and serviced by qualified electrical personnel.
Read, understand and follow the instructions before installing this product.
Turn off all power supplying equipment before working on or inside the equipment.
Use a properly rated voltage sensing device to confirm power is off.
DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION
• Only install this product on insulated conductors.
The H421 and the H421SP are current transducers that sense current (amperage) in the monitored conductor. The
H421 amperage range is field-adjustable, with ranges of 0-1000A thru 0-2400A possible. The H421SP is factoryset at a range with an upper limit specified by the customer upon ordering (1000A, 1200A, 1400A, 1600A, 1800A,
2000A, 2200A, 2400A, and 2400A options available for upper limits). Both devices transform the monitored current
into 4-20mA DC output, suitable for connection to building controllers or other appropriate data acquisition
equipment. The H421 and H421SP require a 12-30 VDC external power supply to generate their output.
Specifications
Sensor Power
Amperage Range
Failure to follow these instructions will result in death or serious injury.
H421: 0-1000A thru 0-2400A (scalable)
H421SP: Factory-set at a customer-specified upper limit (1000, 1200,
1400, 1600, 1800, 2000, 2200, and 2400 A available)
A qualified person is one who has skills and knowledge related to the construction and
operation of this electrical equipment and the installation, and has received safety
training to recognize and avoid the hazards involved.
NEC2011 Article 100
No responsibility is assumed by Veris Industries for any consequences arising out of the
use of this material.
NOTICE
•
•
•
•
30mA (max.) @12-30VDC
This product is not intended for life or safety applications.
Do not install this product in hazardous or classified locations.
The installer is responsible for conformance to all applicable codes.
Mount this product inside a suitable fire and electrical enclosure.
Sensor Output
4-20mA
Response Time
2 sec.
Insulation Class
600VAC RMS, insulated conductors only
Frequency
Temperature Range
Humidity Range
Accuracy
Zero Adjustment
50/60 Hz
-15° to 60°C (5° to 140°F)
10-90% RH non-condensing
±2% F.S. from 10% to 100% of selected current range
nominal [email protected]: 4mA ± 0.5
Terminal Block Wire Size
12 to 22 AWG (3.3 to 0.3 mm2)
Terminal Block Torque
3.5 to 4.4 in-lb (0.4 to 0.5 N-m)
Installation Category
Cat. III, pollution degree 2
This product provides basic insulation only.
Product Identification
Part Number
Z201200-0G
Page 1 of 4
Description
H421
High current monitoring, 4-20 mA analog output, scalable amperage range (1000 to 2400 A upper limit)
H421SP
High current monitoring, 4-20 mA analog output, amperage range set at factory (1000, 1200, 1400,
1600, 1800, 2000, 2200, or 2400 A upper limit, specified by customer at ordering)
©2013 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Current Sensors
H421/H421SP
TM
Dimensions
5.92”
(151 mm)
5.50”
(140 mm)
2.45”
(62mm)
1.13”
(29 mm)
8.13”
(207 mm)
4.90”
(125 mm)
Disconnect and lock out power to the enclosure containing the conductor to be
monitored.
Installation
1. Choose a location for the sensor. The monitored conductor must pass
through the center window, and the sensor must be at least ½” (13 mm)
from any uninsulated conductors. Determine cable routing for the controller
connection, allowing the sensor to reach the conductor.
CONTACTOR
2. Wire the output connections between the sensor and the controller (4-20 mA).
DIGITAL CONTROL
1
42
+
–
3. Snap the sensor over the conductor to be monitored.
4. Secure I-bar to main body of sensor with wire ties or other securing method.
+
–
AI
12-30VDC
Power Supply
Wire tie
Motor
Fan or Pump
5. Secure the enclosure and reconnect power.
6. Scale the sensor range, then scale the controller software to match the sensor’s output (see Scaling section).
Z201200-0G
Page 2 of 4
©2013 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Current Sensors
H421/H421SP
Wiring
TM
Output is not polarity sensitive. 12-30 VDC external power needed.
Example 1: External Power
DDC
CONTROLLER
AI
Span
Zero
Out
1000 2400
Power Supply
Example 2: Powered by the controller
DDC
CONTROLLER
AI
V(COM)
4-20mA
Span
Zero
Scaling
Out
1000 2400
20mA
SENSOR
OUTPUT
4mA
0
10 20 30 40 50 60 70 80 90
100%
LOAD CURRENT
% of Set Span
Z201200-0G
Page 3 of 4
©2013 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Current Sensors
H421/H421SP
Calibration
(H421 Only)
TM
The following calculation is given as an example and uses
sample current values. In an actual application, any values
appropriate to the application (within the range of the device)
can be substituted.
The H421SP is factory-calibrated.
0A
Controller:
4mA Output =
0A Load
Span
1. Set Zero.
0A
Zero
Apply power to the sensor with no load
in the monitored conductor. Turn the
zero setpoint screw until the controller
reads 4 mA output.
Out
1000 2400
Zero
2. Calculate the maximum and target readings.
A. Determine the maximum current likely to occur in the application.
OK!
A
1600 A
B. Establish normal load conditions on the conductor. Measure this current using
an external measurement device, such as a portable amp clamp.
1200 A
C. Calculate target output:
If A = the max. current, and B = the reading from the amp clamp, then:
B + 4 mA
target output = 16 mA x —
A
— + 4 mA = 16 mA
e.g. target output = 16 mA x 1200
1600
3. Set Span.
Turn the span setpoint screw until the controller reading equals the target output.
1200 A
1200 A
Controller:
16 mA Output
= 1200 A Load
Span
Zero
Out
1000 2400
1000 2400
Troubleshooting
Problem
No Reading at Controller
Z201200-0G
Page 4 of 4
Solution
• Confirm that a 12-30 VDC power supply is in series with the sensor output terminals and the control
panel analog input terminals.
• Assure that sensor core mating surfaces are clean and that the core clamp is completely closed.
©2013 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
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