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DH 96 CPP
MAXIMUM DEMAND CONTROLLER

DH96 CPP Maximum Demand Controller is operated from the Utility Revenue Meter The DH96CPP has been engineered to work with two wires of a KYZ, or a form "A" relay in a utility meter or a submeter. Therefore, it is a product that can be used in the utility market as a customer's demand monitor, or be used by the private sector for load monitoring, load alarming, or load shedding. The standard CPP has no relays but displays the information on the front. An optional module with up to four (4) loads can be programmed into the CPP with priority assignments starting with the less essential. The CPP is unlike any other instrument in the market. The CPP is programmable to three demand methods, 1. Block Intervals that has the ability to receive an interval signal from the utility meter. 2. Sliding Window or also referred to as rolling window, 3. A Digitized Thermal Demand Interval. The CPP will also indicate KWhs used.

Panel Mount (as shown) Surface Enclosure available

The DH96CPP Applications:
Monitoring Demand Levels: The CPP will monitor the energy through a pulse supplied by the Utility, which normally is available in mechanical or electronic meters or in a submeter. The CPP is able to receive a signal from the utility meter for the beginning or end of an interval, if segment or block intervals are used. The energy pulse will allow the CPP to calculate the demand and store the peak and average values in its EEPROM. The values will be displayed on the front panel or through software.

Demand Alarm: The CPP will monitor the energy through a pulse supplied by the Utility or from a submeter. The CPP is able to receive a signal from the utility meter for the beginning of an interval, if thermal or block intervals are used. If not the CPP can be programmed to the sliding window method. When the kW level reaches the customer's field programmable set points the contacts will close setting off an alarm horn or light. If the customer is working on a SCADA System and uses our Cirnet Software the alarm will appear on the PC indicating the event.

Reducing Demand through Load Shedding: The CPP has an optional module with four (4) relays which are field programmable and can be used for shedding loads. With the above mentioned demand sampling the relays in the CPP are assignable for alarming or load shedding. One of the four relays would be for the time signal if the block interval demand is used. The shedding operation is visible on your PC through the software option. The programmable perimeters are:
· The energy that corresponds to each pulse input.
· The demand period. (from 1 to 60 minutes).
· The contracted demand level from the utility.
· The number of relays that will be used, from 1 to 4.
· The kW level that each relay is controlling.
· The program that opens and closes the relays: cyclical, where the DH 96 will disconnect first of all the relays that have been connected longer or linear where the disconnection or connection is made by priorities.
· The hysteresis, or difference between the contact closing and the point for it to open.
· The transient time. Depending on the type of load, we can have quick transient variations of the power (for example, installations with a lot of inductive loads) which should not provoke an immediate action from the controller. By means of programming the transient time, we will adjust the response time of the controller to the characteristics of the installation.
· The reconnection delay, so the minimum time that the controller should wait before it connects a certain relay.

A. The DH96CPP will calculate, from the pulses recieved the maximum demand of active energy (kW) or apparent energy (KVA) and its average values. The CPP also regesters the total kWh, allowing you to have up to 999 mwh.

B. All the parameters can be displayed by pressing one of the buttons on the face.

C. The values for the maximum demand are stored in an EEPROM memory, which permits the values to be displayed at any time, and avoids the loss of this data in case of a power failure.

D. The total amount of energy (kWh or kvarh) can be reset to zero at any time.

The program in the DH96 is extremely simple and user friendly. This product is unlike any other in the market and priced right.