The Xikalong series intelligent **ized energy metering system was **ed for student collective apartments with the goal of providing a complete application solution. Its basic starting point is systematic functional combination and effective **ized management: systematic functional combination is a necessary prerequisite for a dedicated system, and effective management is mainly to better suit the use, installation environment and future **ment of student collective apartments. The on-site system can use either a **ized cabinet or a floor-by-floor cabinet system as needed; the power-purchase system consists of a computer with power-purchase software installed and a card reader.

     This system integrates energy calculation, load control, dual protection, charging management and statistical analysis of power-use data, eliminating meter reading and electricity-fee collection. Suited to the characteristics of collective apartments, it effectively prevents cable theft and equipment damage, and can ** management through statistical analysis of power-use data. It uses card technology for prepayment, realizing the modern consumption model of "pay first, consume later" for users. It has low self-power-consumption, and the per-branch power consumption is far lower than ordinary watt-hour meters.

Main Functions:

*Supports two-wire control per branch: can cut/restore power for each user in two circuits (one for lighting and sockets, one for fans).
*Can individually set the maximum power use per household: within the limits allowed by the system, the school can individually set the maximum load for each user via the system software; each user can have a different load value. When this value is exceeded, the system automatically cuts power to that user without manual switch-on, and the system automatically restores power; only when several detections all exceed the set maximum load will it cut power **, and the system automatically records one overload for that user. This both avoids the hassle of students needing to find duty staff to restore power after mistakenly plugging in an appliance, and prevents the use of unsafe appliances, making management easy - a truly humanized design.
**Intelligent load recognition: the system can recognize loads by their inductive or resistive characteristics, thereby effectively controlling the use of high-power resistive loads. This both makes it easier for the school to manage illegal appliances such as electric stoves and avoids fire hazards, without affecting students' use of normal appliances such as computers.
**Can schedule power on/off for all users: in the system software, the week is divided into seven days and each day into four time periods; the school can freely set different power on/off times each day according to its actual situation, and the system executes automatically once set.
**Can individually cut/restore power for a specific user: in the system software this is done by a mouse click, safely and reliably; it can also be done on the manager by entering the room number to cut/restore and then entering the corresponding command.
**Powerful automatic power-off for arrears: besides the simple function of automatically cutting power when electricity runs out, the school can set various conditions via the system software. For example, it can allow a few extra kWh after the fee runs out, avoiding the hassle of power running out at night after staff have left and the fee cannot be paid; in addition, it can allow each user a few free kWh per month and charge beyond that, etc. As for the price per kWh, the school can freely set it according to its situation, facilitating school management.
**Real-time user status indication: the control cabinet panel has various indicator states, each lamp corresponding to one user. Lamp off means power cut; ** means normal supply; red means that user is overloaded or on a resistive load; flashing ** means power is below the minimum and the user should buy power as soon as possible. Both managers and students can see the power status at a glance.
**Convenient payment management: after a student pays, the amount can be entered directly into the system via the system software; the system saves it automatically and can print the receipt directly. This both relieves students of the burden of buying magnetic cards and avoids the trouble of lost or damaged cards.
**Convenient query functions: the system software supports various queries: basic information of each room (room number, dorm leader, phone number, etc.); each user's current-month power use (monthly consumption, amount paid, balance, etc.); last month's power use (same content); the list of illegal use among all users (overloaded room numbers, number of overloads); and current arrears (room numbers in arrears, amounts owed, etc.), all facilitating management.
*Reliable data security: the system has a powerful database that saves each user's monthly power use for 4 years and daily power use for 2 months, with a backup function for regular backups to ensure safety. Even in an unexpected situation, the control cabinet retains each user's 2-month power data, and recovery only requires re-reading the meters. Meanwhile, the control cabinet's memory uses flash storage, so internal data is retained during power cuts.
**Multi-level password protection: from the viewpoint of usage security, the system sets level-1 and level-2 passwords, each with different privileges; different managers can modify system parameters according to the privilege level of the password given to them, while those without a password can only query and cannot change system parameters, ensuring usage security.
**Protection for the power path: the system equips each user with a miniature circuit breaker for short-circuit protection, and can add earth-leakage protection, over-voltage protection and other devices as needed.
*Emergency handling: if the system malfunctions, a switch can cut off the control system and restore the power path, so that even when a fault occasionally occurs, students' power use is not affected.

Technical Specifications:
*System input power: three-phase 380V **Hz
*Per-branch user output power: single-phase 220V **Hz
*Per-branch max current load: 10A-40A (optional)
*Per-branch short-circuit protection value: 10A, 1**, 20A, 30A, 40A (optional)
*Per-branch power consumption: ¡Ü1W
*Operating ambient temperature: -10¡æ-£«**¡æ
*Metering accuracy: Class 1.0
*Creep: anti-creep
*Max stored energy value: 15,000 kWh
*Data storage validity: 10 years
*Safety: meets civil low-voltage distribution equipment requirements
*Reliability: the product withstands power transient pulse interference and operates normally
*Housing insulation resistance: ¡Ý5M
*The network version of the SIMS energy metering management system. Through the school's LAN, it can transmit the power-use information of the entire campus to the school's power management center; the monitoring computers of each management area can be placed in their respective management rooms, facilitating layer-by-layer school management. Students can use a card to query their own power use, or enter a room number to query.