192 series panel meter are Blue Jay electronic early-type Power Panel Meters, designed from 2004, full series product mass production in 2005, accuracy class is 0.5. In 2007 upgrade the hardware and software, the accuracy is higher than 0.5 class.
Full type have voltage meter, amp meter, active power meter, reactive power meter, frequency meter, power factory meter, energy meter.
Products can use in measure three phase and single phase data.
Standard meter case dimension is 96x96x123mm (mode number 9), 120x120x123mm (mode number 2).
193 series panel meter are new generation of panel meter in Blue Jay electronic early-type Power Panel Meters, designed from 2010, full series product mass production in 2011, accuracy class is 0.2.
With improved outlook, suit for most market all over the world, use more compact case, standard panel size (96x96mm), (80x80mm), (72x72mm), depth only 71mm, can be located in small size electrical cabinet.
Tree-phase active power meter reactive power meter, power factor meter combinative in one meter, can effectively reduce the client's investment. Cancel the DC grid measurement series, focus on AC grid metering.
The BJ-194 series Multifunction Power Meter, once cabled and connected is seen to give a correct voltage and current reading, but shows negative values for active power (generation).
This is an error with the cabling for the current transformer secondary; the direction of the transformer current has to be respected as shown in the connection diagram. The current transformers have a two face primary; the current must pass from P1 to P2 giving the result in secondary (S1 and S2) of 5 amps.
The error stems from:
a). The current transformers have been incorrectly installed. As a result it gives the direction of the current as passing from P2 to P1; to resolve this problem, the current transformer does not have to be dismantled and installed again, but the transformer secondary (S1 and S2) just has to be inverted.
b). The connection of the current secondary in the current transformers have been incorrectly connected; to resolve this problem just connect the S1 transformer secondary to the S1 on the meter and the S2 on the current transformer to the S2 on the meter
The BJ-194 series Multifunction Power Meter, once cabled and connected, is seen to give an incoherent Power factor and CosΦ reading (-0.01 or similar).
This is again a current transformer and voltage phase connection error phase A, must correspond to the current transformer installed in phase A; phase B, must correspond to the current transformer installed in phase B; and phase C, must correspond to the current transformer installed in phase C.
This connection is clearly shown on the back of the analyzer.
The BJ-194 series Multifunction Power Meter is measuring in average voltage and is displaying the secondary voltage (for example 110 volts).
Ensure that the voltage Transformer ratio has been correctly set (please refer to the user manul).
The BJ-194 series Multifunction Power Meter does not correctly display the current reading. It shows values varying between 0 to 5 amps of current.
Ensure that the Transformer ratio has been correctly set; once correctly set the current measurement shall be shown correctly (please refer to the user manul).
Maintenace of the power meter
These type multifuction meter does not require any special maintenance. No adjustment, maintenance or repairing action should be done when the instrument open and powered on, should those actions are essential, high-qualified operators must perform them.
Before any adjustment, replacement, maintenance or repairing operation is carried out, the instrument must be disconnected from any power supply source.
When any protection failure is suspected to exist, the instrument must be immediately put out of service. The instrument's design allows a quick replacement in case of any failure.
Blue Jay's Panel Power Meter with universal (AC / DC) power input, Instruments limit work power supply: AC / DC (85-265V), please ensure that the auxiliary power can match for meter to prevent damage to the product.
This type meter have complete over-voltage and under-voltage protection, if your local can not find stable aux power supply, and need to use the power supply for phase to phase voltage, please contact Blue Jay's sales team for 220V/110V transformer power supply, this is anti-harmonic type to prevent frequent trigger over-voltage protection. (in protection trigged, the meter will automatic off power untill user restart the meter manually)
A. Suggest install 1A fuse in the fire line side.
B. For the areas with poor power quality, suggest install lightning surge suppressor and rapid burst suppressor to prevent lightning strikes.
After voltage and current, the most useful measurement available from a battery condition monitor is the SOC (state of charge). However, estimation of the SOC of lead-acid batteries is never exact. The problem of making accurate estimates results from the characteristics of the cells, the electrolyte, and the history of current drawn form (discharge) and supplied to(charge) the battery.
The basis for the best capacity estimates is that the starting condition is known. The only well –established “known” started of a battery is when it is fully charged after a long period of trickle or float charging, usually on a shore or regulated alternator-driven charging system. Discharging a fully-charged new batter at a current 1/20 if the manufacturer’s stated capacity will discharge it fully in 20 hours. This current is known as the “20-hour rate”.
So for example if a battery has a stated capacity of 100Ahr, then the 20-hour rate for that battery is 5Amps (because 100/20=5). Likewise, a 40Ahr battery would have a 20-hour rate of 2Amps (40/20=2).
If higher current than the 20-hour rate are drawn from the battery, the available capacity is reduced. For example, if it is steadily discharged at 10 times the 20-hour rate(50 Amp in 100Ahr battery), the available capacity falls to about half of the stated capacity. The battery will be flat after about 1 hours instead of the expected 2 hours. (However, if the battery is left to recover with the heavy load removed, most of its remaining capacity will return after perhaps 20hours’ resting or at a discharge rate closed to the 20-hour rate.)
When the battery is being charged, the voltage is no longer a reliable estimate of the state of charge, and so the MTX integrates the ampere hours added to the last known capacity to estimate the battery’s state of charge on a continuous basis. Allowance for charge efficiency(not all charging current results in useful charge in the battery) is also computed.
Available battery capacity is significantly reduced at temperatures significantly below 20C. The value quoted by the manufacture is valid at 20C. However, at 0C the capacity may be only 90%, and at -20C may be only 70% of the 20C value. A small increase in capacity is achieved at battery temperatures above 20C, rising to about 105% of the nominal value at 40C.
The effects of cell deterioration on the available capacity are significant. If the battery is charged for long periods, gassing takes place. The gases are Hydrogen and Oxygen, derived from the water in the battery acid. Loss of this water needs to be made up by topping up the cells if possible, or by avoiding lengthy overcharges in sealed cells.
Other irretrievable effects include sulphation(encouraged by leaving the battery flat for long periods), and deterioration of the cells’ plates. If the battery voltage falls below 10.7V (for a nominally 12V battery), and charging is not started, sulphation of the plates can begin. The MTX has alarm setting features, that user can free to set the alarm value in over-voltage or low-voltage condition in 12V, 24V, 48V, 96V battery system. If the alarm is triggered, it is important to reduce the current drawn or stop charging process immediately, to avoid permanent damage to the cells. If the alarm is ignored, the total number of charge/discharge cycles which the battery will survive before it loses a substantial fraction of it nominal capacity may be substantially.
All of these and other effects reduce the available charge after full charging the battery. If the effects are ignored, the MTX will incorrectly estimate that more capacity is available at any state of discharge than is actually the case. If so, it is wise to alter the nominal capacity stored in the unit to match the reality of the battery’s condition.