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Models beginning with 6M, 6L or 6X Mini Meter Multiple Meter Units (MMUs) Product Description Technical Specifications Installation Instructions February 28 , 2013...
1. Product Description General Description The Leviton Mini Meter is a self-powered, current transformer (CT) rated electronic kilowatthour (kWh) meter designed for permanent connection to an electrical service. Mini Meters come in single element (2-wire) and dual element (3-wire) configurations.
Figure 1 below shows the dimensions of a single Mini Meter or Epoxy Encapsulated case and cover. 1.5.1 Enclosures MMU Enclosures are manufactured by BUD Industries, Inc (www.budind.com). Specification sheets are available from their website, part numbers are as follows: Medium Enclosure: NBB-15243 Leviton Manufacturing Co., Inc.
Rated Relative Humidity Terminal Blocks: Dinkle/International Connector 4.4 in-lb of torque maximum EK508-11P or equiv. Table 1: Electrical and environmental specifications Product approved for use with included Leviton Current Transformers, as follows: 400A 200A Leviton Manufacturing Co., Inc.
CT1 : X1 Current Transformer input, CT1. Colored wire of CT 1 CT1 : X2 Current Transformer input, CT1. White wire of CT1 CT2 : X1 Current Transformer input, CT2.Colored wire of CT2 (7B and 5B models only) Leviton Manufacturing Co., Inc.
+12 VDC 12 VDC output; current rating is 3 mA max. (MMS and MMD models only) Table 2: I/O connections *Recommend Leviton mechanical counter (1 kWh models), (0.1 kWh models), or equivalents LED Indicators Description Power LED (green) Illuminates when the meter is supplied with proper voltage...
The following section contains installation and wiring instructions for the Leviton Mini Meter MMUs. If technical assistance is required at any point during the installation, contact information can be found at the end of this manual. Leviton is not responsible for damage to the meter caused by incorrect wiring.
The MMU should not be positioned in a manner that makes it difficult to operate the disconnecting device. Ensure that the CT and voltage lead lengths (and conduit lengths) are capable Leviton Manufacturing Co., Inc.
3. The shaded area indicates appropriate drill area for conduit holes. If possible, holes should be centered along the striped black line. No part of the conduit hole should extend outside of the shaded area. Figure 4: Using the conduit template Leviton Manufacturing Co., Inc.
3.6 Installation of Voltage Lines Note: A panel schedule is highly recommended for factory pre-wiring of MMU internal voltage connections. For Small to Medium Enclosures 1. Verify that branch circuit fuse specifications meet local electric codes. Leviton Manufacturing Co., Inc.
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5. For connections to the voltage terminal block (see example in Figure 8), strip wiring to approximately .300 inches and connect to the appropriate terminals. Wires should be tightened so that they are held snuggly in place, but do not to over-tighten, as this may compress and weaken the conductor. Leviton Manufacturing Co., Inc.
‘in phase’ for accurate readings (e.g. CT1 on Line 1, CT2 on Line 2). For 3 Ph 4-wire electrical panels, see Figure 12 and follow factory-provided meterschedules for correct CT locations. Figure 9: Leviton solid core CTs Installing solid core CTs 1. Route CT wires through the conduit if not already done.
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5. With power to the conductors turned off, place one CT around each conductor, ensuring that the white dot is facing the line side. Failure to install CTs in the correct orientation and on the correct phase will lead to inaccurate meter readings. Leviton Manufacturing Co., Inc.
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Mini Meter MMU Installation Manual Leviton Manufacturing Co., Inc.
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Mini Meter MMU Installation Manual Leviton Manufacturing Co., Inc.
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Mini Meter MMU Installation Manual Leviton Manufacturing Co., Inc.
The purpose of the lock is to prevent access to live parts that pose potential safety risks. To install the lock, slide through the provided holes on the clamp side of the enclosure and fasten securely. Leviton Manufacturing Co., Inc.
4. Maintenance Properly installed meters with sound connections and secure conduit fittings should not require user maintenance. If the meter is functioning abnormally, consult the FAQ/Troubleshooting guide. If the answer cannot be found there, contact Leviton technical support. 5. Troubleshooting/FAQ...
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