SOLID STATE INSTRUMENTS WPG-1 Metering Pulse Generator Instruction Manual
- June 9, 2024
- Solid State Instruments
Table of Contents
INSTALLATION INSTRUCTION SHEET
WPG-1 Metering Pulse Generator
V3.02 Firmware
WPG-1 Metering Pulse Generator
MOUNTING POSITION
The WPG-1 can be mounted in any position. Two mounting holes are provided. The
WPG-1 must be mounted in a non-metallic enclosure or somewhere where it can
receive the wireless information from the meter without interference. The
WPG-1 must be mounted within about 50 feet of your meter. Distances vary with
building construction and proximity to the meter. For best results, mount as
close to the meter as possible. The pulse output lines from the WPG-1 may be
run longer distances, but the WPG-1 should have uninterrupted line-of-sight
access to the greatest extent possible for best results. Choose a mounting
location that will not have any metallic parts — moving or stationary — that
can affect the RF communications.
POWER INPUT – The WPG-1 is powered by an AC voltage of between 120 and
277 volts. Connect the AC supply’s “hot” wire to the L1 terminal. Connect the
NEU terminal to the AC supply’s “neutral” wire. Connect GND to electrical
system Ground. CAUTION: Wire Phase to Neutral only, NOT Phase to Phase. The
power supply is
auto-ranging from 120 to 277VAC. No configuration or settings are necessary.
Ground must be connected. If no true neutral exists at the mounting location,
connect both the NEU and GND terminals to ground.
METER DATA INPUT – The WPG-1 receives data from a WiFi-enabled AMI
electric meter that has been paired with the WPG-1’s WiFi receiver module. The
meter must be paired with the WiFi receiver module before the WPG-1 can be
used. Once paired, the WPG-1 starts receiving kWh, kVARh, or kVAh information
from the meter. (See Page 3.) OPERATION – See the following pages for a full
explanation of the operation of the WPG-1.
OUTPUTS – Two 3-wire isolated dry-contact outputs are provided on the
WPG-1, with output terminals K1, Y1 & Z1 and K2, Y2, & Z2. Transient
suppression for the contacts of the solid-state relays is provided internally.
The output loads should be limited to 100 mA at 120 VAC/VDC. Maximum power
dissipation of each output is 800mW. The outputs are protected by fuses F1&
F2. One-tenth (1/10) Amp fuses (the maximum size) are supplied standard.
WPG-1 Wiring Diagram
WPG-1 Wireless Pulse Generator
Wiring Diagram| REVISIONS
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NO.| DATE| DESCRIPTION
| |
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| |
DATE ORIGINAL
07/1/22| SCALE
N/A| | |
| |
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LATEST REVISION| JOB NO.| CHECKED| DRAWN
WHB
Brayden Automation Corp./ Solid State Instruments div.
6230 Aviation Circle
Loveland, CO 80538
(970)461-9600
support@brayden.com
www.solidstateinstruments.com
WPG-1 Wireless Meter Pulse Generator
Pairing the WiFi Radio Receiver
The WPG-1 contains a Wifi module that acts as a Wifi Access Point. This is
called the WPG_AP. The AMI electric meter must be paired with this access
point. This may be accomplished by the utility or on their website if they
have the process automated. The pairing process, generally known as
“provisioning”, varies from utility to utility, and not all utilities provide
WiFi radio availability in their meters. Contact your electric utility to find
out how their provisioning process is accomplished. The WPG-1 must be powered
for the WPG_AP module to be paired with the meter and must be within range of
the meter, usually within 50-100 feet. The WPG-1 and its carton are labeled
with the SSID and Long Format Device Identifier (“LFDI”).
These are necessary to provision the meter with the WPG-1.
The WPG-1’s Wifi Module’s SSID and LFDI are programmed into the meter or sent
to the meter by the utility over the AMI mesh radio network. By being
“paired”, the meter and the WPG-AP module have created a dedicated 2-node wifi
“network”. No other wifi-enabled devices can join this network. The AP module
(acting as the Client) knows that it can only ask for and receive meter data
from that particular electric meter(acting as the Server).
Before powering the WPG-1, install the WiFi module in the WPG-1’s host slot if
not already mounted. Secure with 4-40 x 1/ 4″ mounting screw.
Power up the WPG-1 (This assumes that the utility has already sent the SSID
and LFID to the meter.)
Apply power to the WPG-1. The RED LED on the WiFi module will flash once per
three seconds looking for the meter.
Once the joining process has been completed, the RED LED will remain on
continuously to indicate that the meter is joined with the WiFi Module in a
wifi network. Once the RED LED is lit continuously, the WPG-1 can receive
information from the meter. The Green LED on the Wifi module will flash 7
times every 8 seconds to indicate that data is being received from the meter.
If no valid communication is received from the meter in the programmed reset
period, the WPG-_AP WiFi module will revert back to looking for the meter, and
the LED will flash once per three seconds. If it is not continuously lit, then
it is not provisioned correctly with the utility meter, the utility meter is
not powered or not available by WiFi, or another problem pre-empting the
provisioning. Do not proceed until this step is successfully completed.
WiFi Module Communication Status LEDs
Upon power-up, the YELLOW Comm LED should light indicating that the WiFi
receiver module is correctly inserted, initialized and communicating with the
WPG-1’s processor. After the successful completion of the pairing, the GREEN
Comm LED should begin to blink once every 8 to 9 seconds. This indicates that
a valid transmission has been received by the receiver module and has been
successfully relayed to the WPG-1’s processor. The Green Comm LED will
continue to blink once every 8-9 seconds continuously as long as the meter is
connected to the WPG-1. If the Green Comm LED does not blink, that is an
indication that the data transmissions from the meter are not being received,
may be corrupted, or in some manner are not valid transmissions. If the Green
Comm LED has been blinking reliably every 8-9 seconds for some time, then
stops for a while and then restarts again, this indicates that transmissions
are intermittent and sporadic, or generally means there is a problem in the
WiFi receiver module’s ability to receive data reliably from the meter. To
correct this, change the proximity of the WPG-1 to the meter, move it closer
to the meter if possible and eliminate any metallic obstructions between the
meter and the WPG-1. Also check to make sure that any walls or barriers
between the WPG-1 and the meter have as little metal in them as possible. In
some applications the WPG-1 may need line-of-sight with the meter.
Pulse Outputs
Outputs can be configured to be in the Toggle (Form C) 3-Wire mode or the
Fixed (Form A) 2-Wire mode. Generally speaking, the Form C mode can be used
with either 2-Wire or 3-Wire pulse receiving devices, while the Form A mode
uses only a 2-Wire interface to the downstream pulse (receiving) device. The
choice would depend on the application and the desired pulse format that the
receiving device prefers to see.
The WPG-1 will “spread out” the pulses over the next 10 second period if a
high enough watt-hour value is received in a transmission to require that more
than one pulse is generated. For example, suppose you have the Output Pulse
Value of 10 wh selected. The next 8 second data transmission indicates that 24
wh have been consumed. Since 24 watt-hours exceeds the 10 watt-hour pulse
value setting, two pulses must be generated. The first 10wh pulse will be
generated immediately. About 4-5 seconds later the second 10wh pulse will be
generated. The remainder of four watt-hours stays in the accumulated energy
register (AER) awaiting the next transmission and the energy value of that
transmission to be added to the contents of the AER. Another example: Assume
25 wh/p Output Pulse Value. Let’s say the next transmission is for 130 watt-
hours. 130 is greater than 25, so 5 pulses will be outputted over the next 7
seconds, approximately one each 1.4 seconds (7 seconds / 5 = 1.4 seconds). The
remainder of 5 wh will stay in the AER awaiting the next transmission. Some
trial and error may have to be done for any particular building since pulse
rates will change depending on maximum load.
Pulse Outputs (con’t)
If the receiver module is reliably receiving data from the meter and
passing it on to the WPG-1’s processor, then you should see the Red (and Green
in the Form C output mode) output LED’s toggle each time the selected pulse
value is reached, and the processor generates a pulse. If the pulse output
value is too high and pulses are too slow, enter a lower pulse value. If
pulses are being generated too rapidly, enter a larger pulse output value. The
maximum number of pulses per second in the toggle mode is approximately 10,
which means that the output’s open and closed times are about 50mS each in
toggle mode. If the calculation by the WPG-1’s processor is for pulse output
timing that exceeds 15 pulses per second, the WPG-1 will light the RED Comm
LED, indicating an overflow error, and that the pulse value is too small. It
is “latched” on so that the next time you look at the WPG-1, the RED Comm LED
will be lit. In this way, you can quickly determine if a pulse output value is
too small. In the optimum application, pulses would not exceed more than one
pulse per second at full scale demand. This allows a very even and “normal”
pulse rate that as closely as possible resembles an actual KYZ pulse output
from the meter.
The WPG-1 has two independent Form C (3-wire) outputs. These are labeled as
K1, Y1, Z1 for output #1 and K2, Y2, Z2 for output #2. Each output can be
operated as FORM C(3-Wire) output or FORM A(2-Wire). If an output is operated
in the Form A mode, the K-Y output is used.
Pulse Types
There are six pulse types: Wh, VARh or VAh pulses, each either as Delivered or
Received quantities. The WPG-1 has the capability to output two of these at a
time on the two independent pulse outputs. This manual refers to watt-hour
pulses, but all references to watt-hour pulses are generally applicable to the
other two pulse types as well, unless otherwise noted. Wh Pulses: Wh pulses
are the real power component of the power triangle. Wh pulses are used to
derive kW. Since Wh pulses are directly available from the WiFi-enabled meter,
the Wh value of a pulse is added to the AER each time a pulse is received.
When the pre-determined output pulse value is reached, a Wh pulse is outputted
on the output assigned. VARh Pulses: VARh pulses are the reactive power
component of the power triangle. VARh pulses are used to derive VAR’s. Since
VARh pulses are directly available from the WiFi-enabled meter, the VARh value
of a pulse is added to the AER each time a pulse is received. When the pre-
determined output pulse value is reached, a VARh pulse is outputted on the
output assigned.
VAh Pulses: VAh pulses are the apparent power component of the power
triangle. VAh pulses are used to derive VA’s. Since VAh pulses are directly
available from the WiFi-enabled meter, the VAh value of a pulse is added to
the AER each time a pulse is received. When the pre-determined output pulse
value is reached, a kVAh pulse is outputted on the output assigned.
It is important that you select the correct type of pulse output. The correct
type of pulse output will depend on your billing structure from the utility
and what you want to use pulses for. If you are doing demand control and your
demand is billed in kW’s then you want to use Wh pulses. Conversely, if you
are billed for demand in kVA, then you want to select VAh pulses. If you are
doing power factor control, you will likely need Wh pulses on one output and
VARh pulses on the other output. Contact your utility or Solid State
Instruments for technical support.
Overranging the Output
As previously mentioned, if there are too many pulses calculated to be
outputted in a 6-7 second interval than the WPG-1 can generate given the
timing constraints, the WPG-1 will light the RED Comm LED. In this situation,
simply increase the output pulse value by entering a higher number in the
Pulse Value box, then click <Save Parameters>. This LED is intended to notify
the user that some pulses have been lost and a larger pulse value is needed.
As load is added to a building over time, there is a greater likelihood that
this may occur, especially if the pulse value is small. Be sure to consider
this if/when you add load to the building. If an error condition occurs, set
the Output Pulse Value for a Wh value that is double the current pulse value.
Remember to change the pulse constant of your receiving device as well, since
pulses will now be worth twice the value. Cycle power to the WPG-1 to reset
the RED Comm LED after increasing the pulse value.
WORKING WITH THE WPG-1 RELAY
OPERATING MODES: The WPG-1 Meter Pulse Generator allows the outputs to be configured in either the “Toggle” or “Fixed” pulse output mode. In the Toggle mode, the outputs alternate or toggle back and forth between K-Y and K-Z continuity each time a pulse is generated. This is synonymous with the classic 3-Wire Pulse metering and emulates the SPDT switch model. Figure 1 below shows the timing diagram for the “Toggle” output mode. K-Y and K-Z closures or continuity are always opposite of each other. In other words, when the K-Y terminals are closed (on), the K-Z terminals are open(off). This mode is best for timing pulses to derive demand whether 2 or 3 physical wires are being used to the downstream (pulse receiving) device or system.
In the Fixed output mode, shown in Figure 2 below, an output pulse (K-Y closure only) is a fixed width (T1) each time the output is triggered. The pulse width (closure time) is determined by the setting of the Pulse Width (W) command. This mode is best for energy (kWh) counting systems but may not be the best for systems doing demand control where pulses are timed to derive instantaneous kW demand. The K-Z output is not used in the normal/fixed mode.
*If the output is configured for Form A pulses the K-Z output is is not used. In Figure 2 above, the K-Z output is disabled, thus showing no pulses.
Contact the factory for technical support at (970)461-9600.
WPG-1 Programming
Setting the WPG-1’s Settings
Set the WPG-1’s output pulse value, the meter multiplier, the pulse output
mode, pulse type and pulse timing by using the USB [Type B] Programming Port
on the WPG-1 board. All system settings are configured using the USB
Programming Port. Download the SSI Universal Programmer software available as
a free download from the SSI website. Alternately, the WPG-1 can be programmed
using a terminal program such as TeraTerm. See “Setting up the Serial Port” on
Page 9.
Programmer Startup
Before starting the program connect the USB cable between your computer and
the WPG-1. Make sure that the WPG-1 is powered up. Click on the SSI Universal
Programmer icon on your desktop to start the program. In the upper left corner
you will observe two Green simulated LEDs, one indicating that the USB cable
is connected and the other that the WPG-1 is connected to the programmer. Make
sure both LED’s are “lit” .
Meter Multiplier
If the building on which you are installing the WPG-1 has an “Instrument-
Rated” electric meter, you must enter the Meter Multiplier to the WPG-1’s
program. If the meter is a “Self-Contained” electric meter, the Meter
Multiplier is 1.
If the facility’s electric metering configuration is Instrument-Rated,
determine the Multiplier of the meter. In an instrumentrated metering
configuration, the meter multiplier is normally the Current Transformer (“CT”)
ratio, but will also include the Potential Transformer (“PT”) Ratio, if PT’s
are used, usually only on larger applications. An 800 Amp to 5 Amp current
transformer, for example, has a ratio of 160. Therefore, the meter multiplier
on a building with 800:5A CT’s would be 160. The Meter Multiplier is normally
printed on the customer’s monthly utility bill. If you cannot find it, call
your utility and ask what the meter or billing multiplier is. To program the
Multiplier in the WPG-1, enter the correct Multiplier in the Meter
Multiplier box and click
Pulse Type
The Pulse Type for the Output 1 Output 2 are set individually. Output pulse
types are Watt-hours (real power), VAR-hours (reactive power) or VA-hours
(apparent power), each as either Delivered or Received. Select the correct
selection in the drop down menu for Output 1 Type and Output 2 Type and click
SSI Universal Programmer
The SSI Universal Programmer is a windows-based programming utility for the
WPG Series and other SSI products. Download the SSI Universal Programmer from
the SSI website at
www.solidstateinstruments.com/sitepages/downloads.php.
There are two versions available for download:
Windows 10 and Windows 7 64-bit Version 1.2.0.0
Windows 7 32-bit V1.2.0.0
If you are using Windows 7, check your computer first to insure you download
the right version.
SOLID STATE INSTRUMENTS
a division of Brayden Automation Corp.
6230 Aviation Circle, Loveland, Colorado 80538
Phone: (970)461-9600
E-mail:support@brayden.com