VERIS INDUSTRIES CURRENT MONITORING INSTALLATION GUIDE ™ TM H735 735 Solid-Core Current Switch, Adjustable Output, with Command Relay Installer’s Specifications Sensor Power Induced from monitored current Insulation Class 600VAC rms (UL) Frequency Range 50/60Hz Relay Coil 24VAC/DC 10mA Relay Contact 5A@250VAC/DC, 3A@30VDC, 1/6 hp Temperature Range -15° to 60°C (5° to 140°F) Humidity Range 10-90% RH non-condensing Amperage Range 1-135A continuous Output N.O. 0.1A@30VAC/DC, polarity insensitive Hysteresis 10% of setpoint, typical Off-State Leakage 1+ MΩ Safety UL 508, CAT III Do not use the LED status indicators as evidence of applied voltage. The product design provides for basic insulation only. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH quick install • 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. 1. Disconnect and lock out power. • Read, understand and follow the instructions before installing this product. • Turn off all power supplying equipment before working on or inside the equipment. 2. Install the mounting bracket to the back of the electrical enclosure, no closer than • Use a properly rated voltage sensing device to confirm power is off. 1/2” (12mm) to an uninsulated conductor. DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION • Only install this product on insulated conductors. 3. Slide the conductor to be monitored through the sensing hole of the current switch. Terminate the conductor. See Notes (page 2) for currents under 1 Amp or Failure to follow these instructions will result in death or serious injury. above 135 Amps. 4. Wire the output connections to the DDC controller or switched load. Note: NOTICE Contacts are solid state and work like dry contacts. When the switch is closed, less than 1 Ω is present. When the switch is open, more than 1 MΩ are present. • This product is not intended for life or safety applications. • Do not install this product in hazardous or classified locations. 5. Reconnect power. • The installer is responsible for conformance to all applicable codes. • Mount this product inside a suitable fire and electrical enclosure. 6. Calibrate the sensor (see Calibration section). Wiring ExamplE DimEnsions Removable/Adjustable Mounting Bracket CONTROLLER 0.9" DI (Status) (23 mm) 0.7" Dia (19 mm) DO (Relay 3.0" Coil) (75 mm) 2.8" (68 mm) 1.1" CONTACTOR (27 mm) Fan or Pump 0.2” x 0.15” 3.8" slot (2x) (95 mm) CONTROL 4.2" POWER (106 mm) Motor Z201486-0H PAGE 1 ©2010 Veris Industries USA 800.354.8556 or +1.503.598.4564 / support@veris.com 08101 Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries. VERIS INDUSTRIES INSTALLATION GUIDE H735 ™ opEration calibration Before beginning calibration, establish normal load conditions. The H735 is a current-sensitive switching device with integral command relay that OK! monitors current (amperage) in the conductor passing through it. A change in amperage in the monitored conductor that crosses the switch (setpoint) threshold A plus the hysteresis value will cause the resistance of the status output to change Then choose either A or B below. state, similar to the action of a mechanical switch. This status information can be fed back to a building controller that interprets the signal and separately switches the A. To monitor under-current (belt loss, coupling shear, status) relay. The status output can also be used to switch the relay directly. STATUS ! OK! OK! A 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 Status 1. Turn setpoint screw connection to building controllers or other appropriate data acquisition equipment Open Setpoint clockwise until Status OPEN operating at up to 30 volts. The H735 relay requires a 24VAC/VDC external power LED turns ON. supply for operation. STOP notEs For load currents greater than sensor maximum rating: 2. Slowly turn the screw counter-clockwise until the Status CLOSED LED just Use a 5 Amp (H68xx series) Current Transformer (CT) as shown. turns ON. 3.Turn the screw an Setpoint Status Setpoint Closed additional 1/4 turn 240A > 135A (Sensor max.) counter-clockwise for + operational margin. 1/4 STOP 300A:5A B. To monitor over-current (mechanical problems, seized impeller) STATUS H68xx-5A CT ! OK! OK! A DANGER: 5A CTs can present hazardous voltages. 1.Turn setpoint screw Status Install CTs in accordance with manufacturer's instructions. Setpoint Closed counter-clockwise until Status Terminate the CT secondary before applying current. CLOSED LED turns ON. STOP CAUTION 2. Slowly turn the setpoint screw clockwise until the Status OPEN LED just turns ON. RISK OF EQUIPMENT DAMAGE Status • Derate the product’s maximum current for the number of turns Setpoint Open 3. Turn the setpoint Setpoint through the sensing window using the following formula. + screw an additional Rated Max. Amps ÷ Number of Turns = Max. monitored Amps 1/4 turn clockwise for e.g. : 100A ÷ 4 Turns = 25 Amps max. in monitored conductor STOP operational margin. 1/4 • Failure to follow these instructions can result in overheating and permanent equipment damage. troublEshooting Problem Solution For load currents less than sensor minimum rating: No Reading at Controller • Check sensor calibration (see above) Wrap the monitored conductor through the center hole and around the sensor body • Check for control voltage at sensor (<30V) to produce multiple turns through the "window." This increases the current measured • Check for amperage in monitored conductor (> 1A) by the transducer. • Assure that sensor core mating surfaces are clean and < 1 A (Sensor Min.) that the core clamp is completely closed Controller must be 4x programmed to account for the Setpoint screw has no stops The setpoint screw has a slip-clutch at both ends of its 0.5A travel to avoid damage. Twenty turns CCW will reset extra turns. e.g., if four turns the sensor to be most sensitive. Repeat calibration pass through the sensor (as above. shown) the normal controller Both LEDs are lit Setpoint screw is too far clockwise. See solution above. reading must be divided by 4. Relay chatters or will not change • Check voltage at relay coil (<24VAC/DC) state • Parallel applications with AC transformers can damage the relay. Z201486-0H PAGE 2 ©2010 Veris Industries USA 800.354.8556 or +1.503.598.4564 / support@veris.com 08101 Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries. OK!