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Related Manuals for Power Measurement 3720 ACM
Summary of Contents for Power Measurement 3720 ACM
- Page 1 Courtesy of NationalSwitchgear.com...
- Page 2 B-1930 Zaventem SET FORTH HEREIN. (Brussels), Belgium Tel: 32-2-720-19-19 3720 ACM is a trade mark of Power Measurement Limited. Other brands and Fax: 32-2-720-95-86 their products are trade marks of their respective holders and should be noted as such. Asia & Pacific P O W E R M E A S U R E M E N T ©...
- Page 3 CONVENTIONS Throughout this operation manual, the following methods are used to highlight important information: Describes important considerations related to a device setup, feature or application. Alerts you to a condition which could potentially cause damage to the device or other external equipment.
- Page 4 Power Measurement 3720 ACM Installation and Operation Manual Table of Contents INTRODUCTION INSTALLATION Location & Mounting ....................2-1 General Wiring Considerations ................2-2 Power Supply Connections ..................2-2 Chassis Ground Connection ..................2-2 Phase Voltage and Phase Current Input Connections ..........2-3 2.5.1...
- Page 5 Table of Contents Field Programming ....................3-6 3.4.1 Introduction ..................... 3-6 3.4.2 Entering Programming Mode ..............3-6 3.4.3 Programming Button Functions ............... 3-6 3.4.4 Entering and Changing the Password ............3-6 3.4.5 Accessing and Modifying Parameters ............. 3-6 3.4.6 Operating Parameter Descriptions ............3-7 Setting the Volts Scale, Amps Scale, I4 Scale, Volts Mode, and Standard Freq ..
- Page 6 Table of Contents SETPOINT SYSTEM Introduction ......................6-1 Setpoint Types ......................6-3 6.2.1 Introduction ..................... 6-3 6.2.2 Setpoint Response Times ............... 6-3 6.2.3 High-Speed Setpoints ................6-3 6.2.4 Standard Setpoints .................. 6-3 Trigger Parameters ....................6-3 6.3.1 Introduction ..................... 6-3 6.3.2 Over &...
- Page 7 General ........................9-1 RS-232C Communication ..................9-1 RS-485 Communication ................... 9-2 Setting the Unit ID & Baud Rate ................9-2 3720 ACM TRAN Model Operation ................9-3 Power Measurement's SCADA System ..............9-3 Third-Party System Compatibility ................9-3 Modbus Protocol ..................... 9-4 9.8.1...
- Page 8 List of Figures Introduction 1.1.1 3710 ACM vs. 3720 ACM Feature Comparison .............. 1-2 Installation 2.1.1 Environmental Guidelines for Installation ............... 2-1 2.5.7a 4 Wire Wye: 3 Element Direct Connection (for 120/208 to 357/600 Volt Systems) ..2-5 2.5.7b 4 Wire Wye: 3 Element Connection Using 3 PTs ............2-6 2.5.7c...
- Page 9 List of Figures Measured Parameters & Status Information 4.3.1 List of Real-Time Base Measurements & Display Labels ..........4-3 4.3.2a List of Measurement Modes for Real-Time Parameters ..........4-4 4.3.2b Thermal Demand Calculation ..................4-5 4.4.2 List of Measurement Modes for Energy Parameters ............4-7 4.5.1 Power Reading Polarities ....................
- Page 10 An internal 16-bit voltage and current inputs. When equipped with the CPU gives the 3720 ACM the processing capability to be appropriate voltage input option, no PTs are required for used as a stand-alone power monitoring and control...
- Page 11 (import/export), kVARh (import/export), or kVAh output These can also be used as pulse counters to measure device pulsing. The basic 3720 ACM provides 10 Amp, Form C cycles, running hours, etc. An internal 30 VDC supply electromechanical relays. The SSR option provides 1 Amp, provides self-excitation for ‘‘volts free’’...
- Page 12 You can program the basic setup parameters of the measurements, the 3720 ACM has also been equipped 3720 ACM quickly and easily from the front panel. Basic with digital waveform sampling capabilities for power parameters include voltage and current scales, voltage quality monitoring and fault analysis.
- Page 13 The 3720 ACM Snapshot Logs are historical or trend logs. in fault location. Up to 8 logs may be defined, each recording up to 12 Waveform recording runs continuously at 16 samples/ channels of time-stamped data.
- Page 14 Remote Communications to a typical accuracy of ±1 ms (max. ±10 ms). This allows for The 3720 ACM is equipped with a selectable RS-232 or RS-485 1 ms time-stamp accuracy on waveform capture and recorder communications port which allows the 3720 ACM to be data, and status input or relay activity in the 3720 ACM integrated within large energy monitoring networks.
- Page 15 Courtesy of NationalSwitchgear.com...
- Page 16 DANGER The mounting enclosure should be positioned such that the doors may be opened fully for easy access to the 3720 ACM During normal operation of this wiring and related components to allow for convenient device, hazardous voltages are troubleshooting.
- Page 17 BASIC MODEL ity to the unit and within easy reach to the The basic model 3720 ACM can be powered by 100 to 240 operator. This switch or circuit breaker VAC (± 10%) or 110 to 300 VDC at 0.2 Amps. Power should be marked as the disconnecting supply options are also available.
- Page 18 For proper monitoring, correct selection of PTs is critical. For Wye systems, the PT primary rating should equal the The 3720 ACM uses the V1 input as the reference for main- system line-to-neutral voltage or nearest higher standard taining phase relationships for all power and energy related size.
- Page 19 DANGER up to 125% of full scale. For example, if the AMPS SCALE has been set at 2000 Amps full scale, the 3720 ACM allows PT secondary circuits are capable of for readings up to 2500 Amps.
- Page 20 I4. This input is typically used to measure the current VAUX I2, I3, I4) inputs to be digitally sampled. The 3720 ACM uses flow in the neutral or ground conductor. The use of this the V1 input as the triggering reference for waveform capture, input is optional.
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