Installation Guide Current Monitoring TM TM Installation Guide Current Monitoring H948 Dimensions Removable Mounting Bracket H948 1.0” (25 mm) Split-Core Current Switch, Adjustable Output, with Command Relay Product Overview 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. Product may use multiple voltage/power sources. Be sure all sources of power have been disconnected before servicing. • 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. Failure to follow these instructions will result in death or serious injury. 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. In this model, the setpoint is adjustable through the action of a twenty (20) turn potentiometer (see the Calibration section). The status output is suitable for connection to building controllers or other appropriate data acquisition equipment operating at up to 30 volts. The H948 relay requires a 24VAC/24VDC external power supply for operation. Amperage Range 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. Status Output Ratings Insulation Class Setpoint Frequency Range Temperature Range Humidity Range Hysteresis 2.5” (64 mm) 3.0” (76 mm) Installation 2. Locate a mounting surface for the removable mounting bracket that will allow the monitored conductor to pass through the center window when it is installed and that will keep the product at least ½” (13 mm) from any uninsulated conductors. Determine cable routing for the controller connection, allowing the wiring to reach the mounting location. 4. Wire the output connections from the sensor output terminals to the controller (solid-state contact) and from the sensor relay terminals to the relay power supply. N.O. 1.0 [email protected] VAC/DC, not polarity sensitive 600 VAC RMS (UL) Adjustable, 2.5 A or less DO (Relay Coil) DI (Status) CONTROL POWER CONTACTOR 5. Snap the sensor over the conductor and clip the assembly to the mounting bracket. 50/60 Hz -15° to 60°C (5° to 140°F) 10-90% RH non-condensing 6. Secure the enclosure and reconnect power. 10% typical 7. Calibrate the sensor with the load running normally. Closed switch represents < 200 mΩ CONTROLLER 3. Drill holes to mount the bracket to the chosen surface using the included screws. 2.5 to 135 A continuous On State Resistance Use DIN Rail Mounting clip (Veris part number AH01) to mount on standard DIN rail. 1. Disconnect and lock out power to the enclosure containing the conductor to be monitored. 24VAC/24VDC external power supply Open switch represents >1 MΩ Terminal Block Torque 1.4” (36 mm) Ø 0.3” (8 mm) Induced from the monitored conductor Off State Resistance Terminal Block Max. Wire Size 0.8” (21 mm) 2.8” (70 mm) Specifications Sensor Power 1.1” (26 mm) Bracket can be mounted on three sides for added installation flexibility. Self-gripping Iris The H948 housing offers unprecedented mounting flexibility. The mounting bracket can be attached in three different places. Additionally, the bracket is compatible with the Veris AH01 DIN Rail clip, allowing DIN mounting. Relay Power NOTICE • • • • 3.1” (79 mm) The H948 is a current-sensitive switching device with integral command relay that monitors current (amperage) in the conductor passing through it. A change in amperage in the monitored conductor that crosses the switch (setpoint) threshold plus the hysteresis value causes the resistance of the status output to change state, similar to the action of a mechanical switch. The building controller interprets the signal and separately switches the relay. The status output can also be used to switch the relay directly. DANGER TM Fan or Pump Motor 24 to 14 AWG (0.2 to 2.1 mm2) 3.5 to 4.4 in-lbs (0.4 to 0.5 N-m) COMPLIANCE INFORMATION Agency Approvals UL508 open device listing Installation Category Cat. III, pollution degree 2 The product design provides basic insulation only. For applications requiring double or reinforced insulation, please contact the factory. Do not use the LED indicators as evidence of applied voltage. Z201499-0B Page 1 of 4 ©2014 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. Z201499-0B Page 2 of 4 ©2014 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 Monitoring H948 Notes TM Installation Guide Current Monitoring H948 Calibration For load currents greater than sensor maximum rating: Before beginning calibration, establish normal load conditions. Then choose either A or B below. Use a 5 Amp (H68xx series) current transformer (CT) as shown. This technique can be combined with wrapping (see below) to add range for a low current load on a high current source. 240A TM A. To monitor under-current (belt loss, coupling shear, status) 1. Turn setpoint screw clockwise until Status Open LED turns on. >135 A (sensor max.) Setpoint Status Open Status Closed DANGER 5A CTs can 300A:5A 4A H68xx-5A CT present hazardous voltages. Install CTs in accordance with manufacturer's instructions. Terminate the CT secondary before applying current. 2. Slowly turn the screw counter clockwise until the Status Closed LED turns on. Wrap the monitored conductor through the center window and around the sensor body to produce multiple turns. This increases the current measured by the transducer. Program the controller to account for the extra turns (e.g., if four turns pass through the sensor (as shown) divide the normal reading by 4). 4x 1A Status Open 3. Turn the screw an additional ¼ turn counter clockwise for operational margin. For load currents less than sensor minimum rating: < 2.5 A (Sensor Min.) Setpoint Setpoint ¼ Status Closed RISK OF EQUIPMENT DAMAGE • Derate the product’s maximum current for the number of turns through the sensing window using the following formula. 1. Turn setpoint screw counter clockwise until Status Closed LED turns on. e.g. : 100A ÷ 4 Turns = 25 Amps max. in monitored conductor • Failure to follow these instructions can result in overheating and permanent equipment damage. Setpoint Status Open 2. Slowly turn the setpoint screw clockwise until the Status Open LED just turns on. 3. Turn the setpoint screw an additional ¼ turn clockwise for operational margin. Troubleshooting Page 3 of 4 Status Open B. To monitor over-current (mechanical problems, seized impeller) CAUTION Rated Max. Amps ÷ Number of Turns = Max. monitored Amps Z201499-0B Status Closed ©2014 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. Z201499-0B Page 4 of 4 Problem Status Closed Setpoint Status Open Status Closed Setpoint ¼ Status Open Status Closed Solution No Reading at Controller • Check sensor calibration (see above) • Check for control voltage at sensor (<30V) • Check for amperage in monitored conductor (> 2.5A) • Assure that sensor core mating surfaces are clean and that the core clamp is completely closed Setpoint screw has no stops The setpoint screw has a slip-clutch at both ends of its travel to avoid damage. Twenty turns CCW will reset the sensor to be most sensitive. Repeat calibration above. Both LEDs are lit Setpoint screw is too far clockwise. See solution above. ©2014 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.
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project